Metallocenes and Catalyst Compositions Derived Therefrom

ABSTRACT

This invention relates to a novel group 2, 3 or 4 transition metal metallocene catalyst compound having two indenyl ligands with identical substitution including, for example, cyclopropyl groups and substituted phenyl groups at the 2 and 4 positions of the catalyst, respectively, where the substituents are at the 3′ and 5′ positions of the phenyl groups.

PRIORITY

This application claims the benefit of and priority to U.S. ProvisionalApplication No. 61/847,456, filed Jul. 17, 2013, the disclosure of whichis fully incorporated herein by reference.

FIELD OF THE INVENTION

This invention relates to novel catalyst compounds and catalyst systemscomprising symmetrically substituted indenyl groups and uses thereof.

BACKGROUND OF THE INVENTION

Olefin polymerization catalysts are of great use in industry. Hencethere is interest in finding new catalyst systems that increase thecommercial usefulness of the catalyst and allow the production ofpolymers having improved properties.

Catalysts for olefin polymerization are often based on metallocenes ascatalyst precursors, which are generally activated either with analumoxane or with an activator containing a non-coordinating anion.

Cyclopropyl cyclopentadiene is reported in “Chemistry ofPolyhalocyclo-pentadienes and related compounds: XVII Reaction ofHexachlorocyclopentadiene with unsaturated compounds,” Reimschneider, R.et al, Univ Berlin-Dahlem, Monatshefte Fuer Chemie (1960).

2-Cyclopropyl indene is disclosed in: 1) “Nickle CatalyzedCarboannulation Reaction of o-Bromobenzyl Zinc Bromide with UnsaturatedCompounds,” Deng, Ruixue, et al. Department of Chemistry, School ofScience, Tianjin University, Tianjin, People's Republic of China,Organic Letters (2007) 9(25) pp. 5207-5210; and 2) “Are PerpendicularAlkene Triplets Just 1,2 Biradicals? Studies with theCyclopropylcarbinyl Clock,” Caldwell, Richard A. et al. Program inChemistry, The University of Texas, Dallas, Richardson, Tex., USA,Journals of the American Chemical Society (1994) 116(6), pp. 2271-2275.

1 and 3-cyclopropyl indene are disclosed in reference to the photolysisof 2-cyclopropyl indene (and have not been prepared in large scale) inUpper Excited State Photochemistry: Solution and Gas PhasePhotochemistry and Photophysics of 2- and 3-Cyclopropylindene. Waugh,Tim; Morrison, Harry. Department of Chemistry, Purdue University, WestLafayette, Ind., USA. Journal of the American Chemical Society (1999),121(13), pp. 3083-3092.

Cyclopropyl substituted fluorenyls are disclosed in “Transformations ofarylcyclopropanes under the action of dinitrogen tetroxide” Mochalov, S.S.; Kuz'min, Ya. I.; Fedotov, A. N.; Trofimova, E. V.; Gazzaeva, R. A.;Shabarov, Yu. S.; Zefirov, N. S., Russian Journal of Organic Chemistry(Translation of Zhurnal Organicheskoi Khimii) (1998), 34(9), pp.1322-1330, MAIK Nauka/Interperiodica Publishing.

2-cyclopropylfluorene is disclosed in the abstract of “Reaction of2-cyclopropylfluorene with mercury acetate,” Shabarov, Yu. S.; Bandaev,S. G.; Sychkova, L. D., Vestnik Moskovskogo Universiteta, Seriya 2:Khimiya, (1976), 17(5), pp. 620-1.

Nitration of 2-cyclopropylbiphenyl is disclosed in “Nitration ofbiphenylcyclopropanes” Mochalov, S. S.; Novokreshchennykh, V. D.;Shabarov, Yu. S., Zhurnal Organicheskoi Khimii (1976), 12(5), pp.1008-14.

Other references of interest include: 1) “An efficient three-stepsynthesis of cyclopenta[b]pyrans via 2-donor-substituted Fischerethenylcarbenechromium complexes,” de Meijere, Armin; Schirmer, Heiko;Stein, Frank; Funke, Frank; Duetsch, Michael; Wu, Yao-Ting; Noltemeyer,Mathias; Belgardt, Thomas; Knieriem, Burkhard, Chemistry—A EuropeanJournal (2005), 11(14), pp. 4132-4148; 2) “Novel Pi Systems PossessingCyclopropenylidene Moiety,” Yoshida, Zenichi, Pure and Applied Chemistry(1982), 54(5), pp. 1059-74; 3) JP 55010596 B (1980); 4) “An efficientthree-step synthesis of cyclopenta[b]pyrans via 2-donor-substitutedFischer ethenylcarbene-chromium complexes,” de Meijere, Armin; Schirmer,Heiko; Stein, Frank; Funke, Frank; Duetsch, Michael; Wu, Yao-Ting;Noltemeyer, Mathias; Belgardt, Thomas; Knieriem, Burkhard, Chemistry—AEuropean Journal (2005), 11(14), pp. 4132-4148; and 5) “Novel Pi SystemsPossessing Cyclopropenylidene Moiety,” Yoshida, Zenichi, Pure andApplied Chemistry (1982), 54(5), pp. 1059-74.

U.S. Pat. No. 7,829,495 discloses alkyl substituted metallocenes havinga “ . . . C₃ or greater hydrocarbyl . . . substitutent bonded to eitherthe LA or LB ring through a primary carbon atom . . . preferably ann-alkyl substituent . . . ” (see column 4, lines 9-12). Further, in theExamples section,(n-propylcyclopentadienyl)(tetramethylcyclopentadienyl)zirconiumdichloride combined with methylalumoxane and Davision™ 948 silica isused for ethylene hexene polymerization; bis(n-propyl cyclopentadienyl)zirconium dichloride combined with methylalumoxane and Davision™ 948silica is used for ethylene hexene polymerization; anddimethylsilyl(flourenyl)(n-propyl cyclopentadienyl) zirconium dichloridecombined with methylalumoxane and Davision silica is used for ethylenehexene polymerization.

Other references of interest include U.S. Pat. No. 6,051,727, U.S. Pat.No. 6,255,506, EP 0 576 970, U.S. Pat. No. 5,459,117, U.S. Pat. No.5,532,396, U.S. Pat. No. 5,543,373, U.S. Pat. No. 5,585,509, U.S. Pat.No. 5,631,202, U.S. Pat. No. 5,696,045, U.S. Pat. No. 5,700,886, U.S.Pat. No. 6,492,465, U.S. Pat. No. 6,150,481, U.S. Pat. No. 5,770,753,U.S. Pat. No. 5,786,432, U.S. Pat. No. 5,840,644, U.S. Pat. No.6,242,544, U.S. Pat. No. 5,869,584, U.S. Pat. No. 6,399,533, U.S. Pat.No. 6,444,833, U.S. Pat. No. 6,559,252, U.S. Pat. No. 6,608,224, U.S.Pat. No. 6,635,779, U.S. Pat. No. 6,841,501, U.S. Pat. No. 6,878,786,U.S. Pat. No. 6,949,614, U.S. Pat. No. 6,953,829, U.S. Pat. No.7,034,173, U.S. Pat. No. 7,141,527, U.S. Pat. No. 7,314,903, U.S. Pat.No. 7,342,078, U.S. Pat. No. 7,405,261, U.S. Pat. No. 7,452,949 U.S.Pat. No. 7,569,651, U.S. Pat. No. 7,615,597, U.S. Pat. No. 7,799,880,U.S. Pat. No. 7,964,679, U.S. Pat. No. 7,985,799, U.S. Pat. No.8,222,356, U.S. Pat. No. 5,278,264, U.S. Pat. No. 5,276,208, U.S. Pat.No. 5,049,535, US2011/0230630, WO 02/022576, WO 02/022575, WO2003/002583, U.S. Pat. No. 7,122,498, US 2011/0230630, US 2010/0267907,EP 1 250 365, WO 97/9740075 and WO 03/045551.

There is still a need in the art for new and improved catalyst systemsfor the polymerization of olefins, in order to achieve specific polymerproperties, such as high melting point, high molecular weights, toincrease conversion or comonomer incorporation, or to alter comonomerdistribution without deteriorating the resulting polymer's properties.

It is therefore an object of the present invention to novel catalystcompounds, catalysts systems comprising such compounds, and processesfor the polymerization of olefins using such compounds and systems.

SUMMARY OF THE INVENTION

This invention relates to a novel group 4 transition metal metallocenecatalyst compound that is symmetric having at two identical indenylligands with: 1) identical substitution including, for example,cyclopropyl groups at the 2 and 8 positions of the indenyl ring; and 2)substituted phenyl groups at the 4 and 10 positions of the indenyl ring,where the substituents are at the 3′ and 5′ positions of the phenylgroups.

In certain aspects, it has been surprisingly found that metallocenecatalysts described herein produce propylene polymers with high meltingpoints and high molecular weights while maintaining goodactivity/productivity at industrial operating temperatures andconditions.

In other aspects, dimethylsilylbis(2-methyl,4-phenylinenyl)ZrCl₂produces higher melting point and molecular weight propylene polymersbut with very low catalyst activity/productivity, possibly due to thebulky α-branched alkyl group at 2-position. The present inventioncombines 3,5-di-tert-butylphenyl substituent on the 4-position with morerigid and less sterically demanding cycloalkyl groups, such ascyclopropyl (compared to, for example, 2-isopropyl) substituent on the2-position to facilitate the isolation of rac-metallocene, which canproduce propylene polymers with high melting point and high molecularweights while maintaining good activity/productivity.

In still other aspects, one or more of the following factors have beenutilized to prepare indenyl metallocene catalysts with goodproductivity, that produce polymers with high molecular weight andhigher Tm's than conventionally prepared polymers. These factorsinclude, for example, 1) a small bridge between the indenyl groups, 2)meta substitution on the phenyl groups at the 4 position and 10positions of the indenyl ring, 3) cyclic groups at the 2 position and 8positions of the indenyl ring, 4) and enhanced rac:meso ratio, and/or 5)“symmetric” substitution (meaning that the two indenyl rings have thesame substitutions at the same positions).

The invention relates to a metallocene catalyst compound represented bythe formula:

wherein,

each of the indenyl rings are substituted with the same substituents atthe same positions;

R⁴ and R¹⁰ are substituted phenyls having substitutions at 3′ and 5′positions of the phenyl rings;

R² and R⁸ are cyclic groups;

M is a group transition 2, 3 or 4 metal;

T is a bridging group;

each X is an anionic leaving group; and

each R¹, R³, R⁵, R⁶, R⁷, R⁹, R¹¹, R¹², R¹³, and R¹⁴ is, independently,hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl,substituted halocarbyl, silylcarbyl, substituted silylcarbyl,germylcarbyl, or substituted germylcarbyl substituents.

This invention further relates to a catalyst system comprising saidmetallocene catalyst compound(s) and an activator.

This invention further relates to a method to polymerize olefinscomprising contacting olefins with a catalyst system comprising saidmetallocene catalyst compound(s) described above and an activator.

This invention also relates to a method to prepare said metallocenecatalyst compound(s).

This invention further relates to polymer compositions produced by themethods described herein.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a chemical drawing of the metallocene catalyst: dimethylsilylbis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl) zirconiumdichloride.

FIG. 2 is a graph of the polymer 1% Secant flexural modulus vs. MeltFlow Rate (MFR, dg/min) of the polypropylene produced according topolymerization examples shown in Table 3.

DETAILED DESCRIPTION

For the purposes of this invention and the claims thereto, the newnumbering scheme for the Periodic Table Groups is used as described inCHEMICAL AND ENGINEERING NEWS, 63(5), p. 27 (1985). Therefore, a “Group4 metal” is an element from Group 4 of the Periodic Table.

Unless otherwise indicated, “catalyst productivity” is a measure of howmany grams of polymer (P) are produced using a polymerization catalystcomprising W g of catalyst (cat), over a period of time of T hours; andmay be expressed by the following formula: P/(T×W) and expressed inunits of gPgcat⁻¹hr⁻¹. Unless otherwise indicated, “catalyst activity”is a measure of how active the catalyst is and is reported as the massof product polymer (P) produced per mole of catalyst (cat) used(kgP/molcat). Unless otherwise indicated, “conversion” is the amount ofmonomer that is converted to polymer product, and is reported as mol %and is calculated based on the polymer yield and the amount of monomerfed into the reactor.

An “olefin,” alternatively referred to as “alkene,” is a linear,branched, or cyclic compound of carbon and hydrogen having at least onedouble bond. For purposes of this specification and the claims appendedthereto, when a polymer or copolymer is referred to as comprising anolefin, the olefin present in such polymer or copolymer is thepolymerized form of the olefin. For example, when a copolymer is said tohave an “ethylene” content of 35 wt % to 55 wt %, it is understood thatthe mer unit in the copolymer is derived from ethylene in thepolymerization reaction and said derived units are present at 35 wt % to55 wt %, based upon the weight of the copolymer. A “polymer” has two ormore of the same or different mer units. A “homopolymer” is a polymerhaving mer units that are the same. A “copolymer” is a polymer havingtwo or more mer units that are different from each other. A “terpolymer”is a polymer having three mer units that are different from each other.“Different” as used to refer to mer units indicates that the mer unitsdiffer from each other by at least one atom or are differentisomerically. Accordingly, the definition of copolymer, as used herein,includes terpolymers and the like. An oligomer is typically a polymerhaving a low molecular weight (such an Mn of less than 25,000 g/mol,preferably less than 2,500 g/mol) or a low number of mer units (such as75 mer units or less). An “ethylene polymer” or “ethylene copolymer” isa polymer or copolymer comprising at least 50 mole % ethylene derivedunits, a “propylene polymer” or “propylene copolymer” is a polymer orcopolymer comprising at least 50 mole % propylene derived units, and soon.

For the purposes of this invention, ethylene shall be considered anα-olefin.

For purposes of this invention and claims thereto, the term“substituted” means that a hydrogen group has been replaced with aheteroatom, or a heteroatom containing group. For example, a“substituted hydrocarbyl” is a radical made of carbon and hydrogen whereat least one hydrogen is replaced by a heteroatom or heteroatomcontaining group.

Unless otherwise indicated, room temperature is 23° C.

“Different” or “not the same” as used to refer to R groups in anyformula herein (e.g. R2 and R8 or R4 and R10) or any substituent hereinindicates that the groups or substituents differ from each other by atleast one atom or are different isomerically. Likewise “same” means thatthe groups or substituents do not differ from each other by at least oneatom or do not differ isomerically. “Substituted at the same positions”means that the indenyl groups are substituted at the same position onboth indenyl rings relative to the bridge for bridged species orrelative to the cyclopentadienyl ring for unbridged species.

As used herein, Mn is number average molecular weight, Mw is weightaverage molecular weight, and Mz is z average molecular weight, wt % isweight percent, and mol % is mole percent. Molecular weight distribution(MWD), also referred to as polydispersity, is defined to be Mw dividedby Mn. Unless otherwise noted, all molecular weight units (e.g., Mw, Mn,Mz) are g/mol. The following abbreviations may be used herein: Me ismethyl, Et is ethyl, Pr is propyl, cPr is cyclopropyl, nPr is n-propyl,iPr is isopropyl, Bu is butyl, nBu is normal butyl, iBu is isobutyl, sBuis sec-butyl, tBu is tert-butyl, Oct is octyl, Ph is phenyl, Bn isbenzyl, MAO is methylalumoxane.

A “catalyst system” is combination of at least one catalyst compound, atleast one activator, an optional co-activator, and an optional supportmaterial. For the purposes of this invention and the claims thereto,when catalyst systems are described as comprising neutral stable formsof the components, it is well understood by one of ordinary skill in theart, that the ionic form of the component is the form that reacts withthe monomers to produce polymers.

In the description herein, the metallocene catalyst may be described asa catalyst precursor, a pre-catalyst compound, metallocene catalystcompound or a transition metal compound, and these terms are usedinterchangeably. A polymerization catalyst system is a catalyst systemthat can polymerize monomers to polymer. An “anionic ligand” is anegatively charged ligand which donates one or more pairs of electronsto a metal ion. A “neutral donor ligand” is a neutrally charged ligandwhich donates one or more pairs of electrons to a metal ion.

A metallocene catalyst is defined as an organometallic compound with atleast one π-bound cyclopentadienyl moiety (or substitutedcyclopentadienyl moiety) and more frequently two π-boundcyclopentadienyl moieties or substituted cyclopentadienyl moieties.

For purposes of this invention and claims thereto in relation tometallocene catalyst compounds, the term “substituted” means that ahydrogen group has been replaced with a hydrocarbyl group, a heteroatom,or a heteroatom containing group. For example, methyl cyclopentadiene(Cp) is a Cp group substituted with a methyl group.

For purposes of this invention and claims thereto, “alkoxides” includethose where the alkyl group is a C₁ to C₁₀ hydrocarbyl. The alkyl groupmay be straight chain, branched, or cyclic. The alkyl group may besaturated or unsaturated. In some embodiments, the alkyl group maycomprise at least one aromatic group.

Metallocene Catalyst Compounds

This invention relates to a novel group 4 transition metal metallocenecatalyst compound having two indenyl ligands with: 1) with the samesubstitution including, for example, cyclopropyl groups at the 2 and 8positions, and 2) substituted phenyl groups at the 4 and 10 positions ofthe catalyst, where the substituents are at the 3′ and 5′ positions ofthe phenyl groups.

The invention relates to a metallocene catalyst compound represented bythe formula:

wherein,

each of the indenyl rings are substituted with the same substituents atthe same positions;

R⁴ and R¹⁰ are phenyls having substitutions at the 3′ and 5′ positionsof the phenyl rings;

R² and R⁸ are cyclic groups;

M is a group transition 2, 3 or 4 metal;

T is a bridging group;

each X is an anionic leaving group; and

each R¹, R³, R⁵, R⁶, R⁷, R⁹, R¹¹, R¹², R¹³, and R¹⁴ is, independently,hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl,substituted halocarbyl, silylcarbyl, substituted silylcarbyl,germylcarbyl, or substituted germylcarbyl substituents.

In one embodiment, R² and R⁸ are cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl,cycloundecanyl, cyclododecyl, a methylcycloalkyl group, anethylcycloalkyl group, a methylcycloalkyl alkyl substituted group or anethylcycloalkyl substituted alkyl group, preferably R² and R⁸ arecyclopropyl groups.

In another embodiment, R⁴ and R¹⁰ are substituted at 3′ and 5′ positionsof the phenyl rings with a C₁ to a C₁₀ alkyl group, preferably the C₁ toC₁₀ alkyl groups are t-butyl, sec-butyl, n-butyl, isopropyl, n-propyl,cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl,cyclooctyl, phenyl, mesityl, or adamantyl groups, preferably t-butylgroups.

Suitable radicals for the each of the groups R¹, R³, R⁵, R⁶, R⁷, R⁹,R¹¹, R¹², R¹³, and R¹⁴ are selected from hydrogen or hydrocarbylradicals including methyl, ethyl, ethenyl, and all isomers (includingcyclics such as cyclohexyl) of propyl, butyl, pentyl, hexyl, heptyl,octyl, nonyl, decyl, undecyl, dodecyl, propenyl, butenyl, and fromhalocarbyls and all isomers of halocarbyls including perfluoropropyl,perfluorobutyl, perfluoroethyl, perfluoromethyl, and from substitutedhydrocarbyl radicals and all isomers of substituted hydrocarbyl radicalsincluding trimethylsilylpropyl, trimethylsilylmethyl,trimethylsilylethyl, and from phenyl, and all isomers of hydrocarbylsubstituted phenyl including methylphenyl, dimethylphenyl,trimethylphenyl, tetramethylphenyl, pentamethylphenyl, diethylphenyl,triethylphenyl, propylphenyl, dipropylphenyl, tripropylphenyl,dimethylethylphenyl, dimethylpropylphenyl, dimethylbutylphenyl,dipropylmethylphenyl, and the like; from all isomers of halo substitutedphenyl (where halo is, independently, fluoro, chloro, bromo and iodo)including halophenyl, dihalophenyl, trihalophenyl, tetrahalophenyl, andpentahalophenyl; and from all isomers of halo substituted hydrocarbylsubstituted phenyl (where halo is, independently, fluoro, chloro, bromoand iodo) including halomethylphenyl, dihalomethylphenyl,(trifluoromethyl)phenyl, bis(triflouromethyl)phenyl; and from allisomers of benzyl, and all isomers of hydrocarbyl substituted benzylincluding methylbenzyl, dimethylbenzyl.

In still another embodiment, M is Hf, Ti and/or Zr, preferably Hf and/orZr, preferably Zr.

In other embodiments, each X is, independently, selected from the groupconsisting of hydrocarbyl radicals having from 1 to 20 carbon atoms,hydrides, amides, alkoxides, sulfides, phosphides, halides, dienes,amines, phosphines, ethers, and a combination thereof, (two X's may forma part of a fused ring or a ring system).

Suitable examples for X include chloride, bromide, fluoride, iodide,hydride, and C₁ to C₂₀ hydrocarbyls, preferably methyl, ethyl, propyl,butyl, pentyl, hexyl, phenyl, benzyl, and all isomers thereof, or two Xtogether are selected from C₄ to C₁₀ dienes, preferably butadiene,methylbutadiene, pentadiene, methylpentadiene, dimethylpentadiene,hexadiene, methylhexadiene, dimethylhexadiene, or from C₁ to C₁₀alkylidenes, preferably methylidene, ethylidene, propylidene, or from C₃to C₁₀ alkyldiyls, preferably propandiyl, butandiyl, pentandiyl, andhexandiyl. In particular, X is chloride or methyl.

In another embodiment, T is selected from R′₂C, R′₂Si, R′₂Ge, R′₂CCR′₂,R′₂CCR′₂CR′₂, R′C═CR′, R′C═CR′CR′₂, R′₂CSiR′₂, R′₂SiSiR′₂,R′₂CSiR′₂CR′₂, R′₂SiCR′₂SiR′₂, R′C═CR′SiR′₂, R′₂CGeR′₂, R′₂GeGeR′₂,R′₂CGeR′₂CR′₂, R′₂GeCR′₂GeR′₂, R′₂SiGeR′₂, R′C═CR′GeR′₂, R′B, R′₂C—BR′,R′₂C—BR′—CR′₂, R′N, R′₂C—NR′, R′₂C—NR′—CR′₂, R′P, R′₂C—PR′, andR′₂C—PR′—CR′₂ where R′ is, independently, hydrogen, hydrocarbyl,substituted hydrocarbyl, halocarbyl, substituted halocarbyl,silylcarbyl, or germylcarbyl, and two or more R′ on the same atom or onadjacent atoms may join together to form a substituted or unsubstituted,saturated, partially unsaturated, or aromatic cyclic or polycyclicsubstituent.

Suitable examples for the bridging group T includedihydrocarbylsilylenes including dimethylsilylene, diethylsilylene,dipropylsilylene, dibutylsilylene, dipentylsilylene,cyclotrimethylenesilylene, cyclotetramethylenesilylene,cyclopentamethylenesilylene, dimethylgermylene, diethylgermylene,dipropylgermylene, dibutylgermylene, cyclotrimethylenegermylene,cyclotetramethylenegermylene, cyclopentamethylenegermylene; carbylenesand carbdiyls including methylene, dimethylmethylene, diethylmethylene,dibutylmethylene, dipropylmethylene, diphenylmethylene,ditolylmethylene, dibenzylmethylene, cyclotetramethylenemethylene,cyclopentamethylenemethylene, ethylene, methylethylene,dimethylethylene, trimethylethylene, tetramethylethylene,cyclopropylene, cyclobutylene, cyclopentylene, propanediyl,methylpropanediyl, dimethylpropanediyl, trimethylpropanediyl,tetramethylpropanediyl, pentamethylpropanediyl, hexamethylpropanediyl,vinylene, and ethene-1,1-diyl and combinations thereof includingdimethylsilylmethylene and dimethylsilylethylene.

In particular, T is CH₂, CH₂CH₂, C(CH₃)₂, SiMe₂, SiPh₂, SiMePh,Si(CH₂)₃, Si(CH₂)₄, Si(Me₃SiPh)₂, or Si(CH₂)₅.

In another embodiment, T is represented by the formula R₂ ^(a)J, where Jis C, Si, or Ge, and each R^(a) is, independently, hydrogen, halogen, C₁to C₂₀ hydrocarbyl or a C₁ to C₂₀ substituted hydrocarbyl, and two R^(a)can form a cyclic structure including aromatic, partially saturated, orsaturated cyclic or fused ring system.

In a preferred embodiment of the invention in any formula describedherein, T is represented by the formula, (R*₂G)_(g), where each G is C,Si, or Ge, g is 1 or 2, and each R* is, independently, hydrogen,halogen, C1 to C20 hydrocarbyl or a C1 to C20 substituted hydrocarbyl,and two or more R* can form a cyclic structure including aromatic,partially saturated, or saturated cyclic or fused ring system.

In an embodiment, the catalyst is one or more of:dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-butylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-butylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-phenylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-phenylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-isopropylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-isopropylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-methylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-methylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-hexylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-hexylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-n-butylphenyl)indenyl)HfCl₂,and/ordimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-nt-butylphenyl)indenyl)ZrCl₂.

In particular embodiments, the rac/meso ratio of the metallocenecatalyst is 100:1 or greater, or 90:1 or greater, or 50:1 or greater, or40:1 or greater, or 30:1 or greater, or 20:1 or greater, or 15:1 orgreater, or 10:1 or greater, or 7:1 or greater, or 5:1 or greater.

In an embodiment of the invention, the metallocene catalyst comprisesgreater than 55 mol % of the racemic isomer, or greater than 60 mol % ofthe racemic isomer, or greater than 65 mol % of the racemic isomer, orgreater than 70 mol % of the racemic isomer, or greater than 75 mol % ofthe racemic isomer, or greater than 80 mol % of the racemic isomer, orgreater than 85 mol % of the racemic isomer, or greater than 90 mol % ofthe racemic isomer, or greater than 92 mol % of the racemic isomer, orgreater than 95 mol % of the racemic isomer, or greater than 98 mol % ofthe racemic isomer, based on the total amount of the racemic and mesoisomer-if any, formed. In a particular embodiment of the invention, thebridged bis(indenyl)metallocene transition metal compound formedconsists essentially of the racemic isomer.

Amounts of rac and meso isomers are determined by proton NMR. ¹H NMRdata are collected at 23° C. in a 5 mm probe using a 400 MHz Brukerspectrometer with deuterated methylene chloride or deuterated benzene.Data is recorded using a maximum pulse width of 45°, 8 seconds betweenpulses and signal averaging 16 transients. The spectrum is normalized toprotonated methylene chloride in the deuterated methylene chloride,which is expected to show a peak at 5.32 ppm.

In a preferred embodiment in any of the processes described herein onecatalyst compound is used, e.g. the catalyst compounds are notdifferent. For purposes of this invention one metallocene catalystcompound is considered different from another if they differ by at leastone atom. For example “bisindenyl zirconium dichloride” is differentfrom (indenyl)(2-methylindenyl)zirconium dichloride” which is differentfrom “(indenyl)(2-methylindenyl)hafnium dichloride.” Catalyst compoundsthat differ only by isomer are considered the same for purposes if thisinvention, e.g., rac-dimethylsilylbis(2-methyl 4-phenyl)hafnium dimethylis considered to be the same as meso-dimethylsilylbis(2-methyl4-phenyl)hafnium dimethyl.

In some embodiments, two or more different catalyst compounds arepresent in the catalyst system used herein. In some embodiments, two ormore different catalyst compounds are present in the reaction zone wherethe process(es) described herein occur. When two transition metalcompound based catalysts are used in one reactor as a mixed catalystsystem, the two transition metal compounds should be chosen such thatthe two are compatible. A simple screening method such as by ¹H or ¹³CNMR, known to those of ordinary skill in the art, can be used todetermine which transition metal compounds are compatible. It ispreferable to use the same activator for the transition metal compounds,however, two different activators, such as a non-coordinating anionactivator and an alumoxane, can be used in combination. If one or moretransition metal compounds contain an X₁ or X₂ ligand which is not ahydride, hydrocarbyl, or substituted hydrocarbyl, then the alumoxane istypically contacted with the transition metal compounds prior toaddition of the non-coordinating anion activator.

The transition metal compounds (pre-catalysts) may be used in any ratio.Preferred molar ratios of (A) transition metal compound to (B)transition metal compound fall within the range of (A:B) 1:1000 to1000:1, alternatively 1:100 to 500:1, alternatively 1:10 to 200:1,alternatively 1:1 to 100:1, and alternatively 1:1 to 75:1, andalternatively 5:1 to 50:1. The particular ratio chosen will depend onthe exact pre-catalysts chosen, the method of activation, and the endproduct desired. In a particular embodiment, when using the twopre-catalysts, where both are activated with the same activator, usefulmole percents, based upon the molecular weight of the pre-catalysts, are10 to 99.9% A to 0.1 to 90% B, alternatively 25 to 99% A to 0.5 to 50%B, alternatively 50 to 99% A to 1 to 25% B, and alternatively 75 to 99%A to 1 to 10% B.

Methods to Prepare the Catalyst Compounds

Generally, metallocenes of this type are synthesized as shown belowwhere (i) is a deprotonation via a metal salt of alkyl anion (e.g.nBuLi) to form an indenide. (ii) reaction of indenide with anappropriate bridging precursor (e.g. Me₂SiCl₂). (iii) reaction of theabove product with AgOTf. (iv) reaction of the above triflate compoundwith another equivalent of indenide. (v) double deprotonation via analkyl anion (e.g. nBuLi) to form a dianion (vi) reaction of the dianionwith a metal halide (e.g. ZrCl₄). The final products are obtained byrecrystallization of the crude solids.

Activators

The terms “cocatalyst” and “activator” are used herein interchangeablyand are defined to be any compound which can activate any one of thecatalyst compounds described above by converting the neutral catalystcompound to a catalytically active catalyst compound cation.Non-limiting activators, for example, include alumoxanes, aluminumalkyls, ionizing activators, which may be neutral or ionic, andconventional-type cocatalysts. Preferred activators typically includealumoxane compounds, modified alumoxane compounds, and ionizing anionprecursor compounds that abstract a reactive, σ-bound, metal ligandmaking the metal complex cationic and providing a charge-balancingnoncoordinating or weakly coordinating anion.

In one embodiment, alumoxane activators are utilized as an activator inthe catalyst composition. Alumoxanes are generally oligomeric compoundscontaining —Al(R¹)—O— sub-units, where R¹ is an alkyl group. Examples ofalumoxanes include methylalumoxane (MAO), modified methylalumoxane(MMAO), ethylalumoxane and isobutylalumoxane. Alkylalumoxanes andmodified alkylalumoxanes are suitable as catalyst activators,particularly when the abstractable ligand is an alkyl, halide, alkoxideor amide. Mixtures of different alumoxanes and modified alumoxanes mayalso be used. It may be preferable to use a visually clearmethylalumoxane. A cloudy or gelled alumoxane can be filtered to producea clear solution or clear alumoxane can be decanted from the cloudysolution. A useful alumoxane is a modified methyl alumoxane (MMAO)cocatalyst type 3A (commercially available from Akzo Chemicals, Inc.under the trade name Modified Methylalumoxane type 3A, covered underU.S. Pat. No. 5,041,584).

When the activator is an alumoxane (modified or unmodified), someembodiments select the maximum amount of activator at a 5000-fold molarexcess Al/M over the catalyst compound (per metal catalytic site). Theminimum activator-to-catalyst-compound is a 1:1 molar ratio. Alternatepreferred ranges include from 1:1 to 1000:1, alternately from 1:1 to500:1, alternately from 1:1 to 200:1, alternately from 1:1 to 100:1, oralternately from 1:1 to 50:1.

In an alternate embodiment, little or no alumoxane is used in thepolymerization processes described herein. Preferably, alumoxane ispresent at zero mole %, alternately the alumoxane is present at a molarratio of aluminum to catalyst compound transition metal less than 500:1,preferably less than 300:1, preferably less than 100:1, preferably lessthan 1:1.

The term “non-coordinating anion” (NCA) means an anion which either doesnot coordinate to a cation or which is only weakly coordinated to acation thereby remaining sufficiently labile to be displaced by aneutral Lewis base. “Compatible” non-coordinating anions are those whichare not degraded to neutrality when the initially formed complexdecomposes. Further, the anion will not transfer an anionic substituentor fragment to the cation so as to cause it to form a neutral transitionmetal compound and a neutral by-product from the anion. Non-coordinatinganions useful in accordance with this invention are those that arecompatible, stabilize the transition metal cation in the sense ofbalancing its ionic charge at +1, and yet retain sufficient lability topermit displacement during polymerization.

It is within the scope of this invention to use an ionizing orstoichiometric activator, neutral or ionic, such as tri(n-butyl)ammonium tetrakis(pentafluorophenyl)borate, a tris perfluorophenyl boronmetalloid precursor or a tris perfluoronaphthyl boron metalloidprecursor, polyhalogenated heteroborane anions (WO 98/43983), boric acid(U.S. Pat. No. 5,942,459), or combination thereof. It is also within thescope of this invention to use neutral or ionic activators alone or incombination with alumoxane or modified alumoxane activators.

Examples of neutral stoichiometric activators include tri-substitutedboron, tellurium, aluminum, gallium, and indium, or mixtures thereof.The three substituent groups are each independently selected fromalkyls, alkenyls, halogens, substituted alkyls, aryls, arylhalides,alkoxy, and halides. Preferably, the three groups are independentlyselected from halogen, mono or multicyclic (including halosubstituted)aryls, alkyls, and alkenyl compounds, and mixtures thereof, preferredare alkenyl groups having 1 to 20 carbon atoms, alkyl groups having 1 to20 carbon atoms, alkoxy groups having 1 to 20 carbon atoms and arylgroups having 3 to 20 carbon atoms (including substituted aryls). Morepreferably, the three groups are alkyls having 1 to 4 carbon groups,phenyl, naphthyl, or mixtures thereof. Even more preferably, the threegroups are halogenated, preferably fluorinated, aryl groups. A preferredneutral stoichiometric activator is tris perfluorophenyl boron or trisperfluoronaphthyl boron.

Ionic stoichiometric activator compounds may contain an active proton,or some other cation associated with, but not coordinated to, or onlyloosely coordinated to, the remaining ion of the ionizing compound. Suchcompounds and the like are described in European publications EP 0 570982 A; EP 0 520 732 A; EP 0 495 375 A; EP 0 500 944 B1; EP 0 277 003 A;EP 0 277 004 A; U.S. Pat. Nos. 5,153,157; 5,198,401; 5,066,741;5,206,197; 5,241,025; 5,384,299; 5,502,124; and U.S. patent applicationSer. No. 08/285,380, filed Aug. 3, 1994; all of which are herein fullyincorporated by reference.

Preferred compounds useful as an activator in the process of thisinvention comprise a cation, which is preferably a Bronsted acid capableof donating a proton, and a compatible non-coordinating anion whichanion is relatively large (bulky), capable of stabilizing the activecatalyst species (the Group 4 cation) which is formed when the twocompounds are combined and said anion will be sufficiently labile to bedisplaced by olefinic, diolefinic and acetylenically unsaturatedsubstrates or other neutral Lewis bases, such as ethers, amines, and thelike. Two classes of useful compatible non-coordinating anions have beendisclosed in EP 0 277,003 A1, and EP 0 277,004 A1: 1) anioniccoordination complexes comprising a plurality of lipophilic radicalscovalently coordinated to and shielding a central charge-bearing metalor metalloid core; and 2) anions comprising a plurality of boron atomssuch as carboranes, metallacarboranes, and boranes.

In a preferred embodiment, the stoichiometric activators include acation and an anion component, and are preferably represented by thefollowing formula (II):

(Z)_(d) ⁺(A^(d−))  (II)

wherein Z is (L-H) or a reducible Lewis Acid, L is an neutral Lewisbase; H is hydrogen; (L-H)⁺ is a Bronsted acid; A^(d−) is anon-coordinating anion having the charge d−; and d is an integer from 1to 3.

When Z is (L-H) such that the cation component is (L-H)_(d) ⁺, thecation component may include Bronsted acids such as protonated Lewisbases capable of protonating a moiety, such as an alkyl or aryl, fromthe bulky ligand metallocene containing transition metal catalystprecursor, resulting in a cationic transition metal species. Preferably,the activating cation (L-H)_(d) ⁺ is a Bronsted acid, capable ofdonating a proton to the transition metal catalytic precursor resultingin a transition metal cation, including ammoniums, oxoniums,phosphoniums, silyliums, and mixtures thereof, preferably ammoniums ofmethylamine, aniline, dimethylamine, diethylamine, N-methylaniline,diphenylamine, trimethylamine, triethylamine, N,N-dimethylaniline,methyldiphenylamine, pyridine, p-bromo N,N-dimethylaniline,p-nitro-N,N-dimethylaniline, phosphoniums from triethylphosphine,triphenylphosphine, and diphenylphosphine, oxoniums from ethers, such asdimethyl ether diethyl ether, tetrahydrofuran, and dioxane, sulfoniumsfrom thioethers, such as diethyl thioethers and tetrahydrothiophene, andmixtures thereof.

When Z is a reducible Lewis acid it is preferably represented by theformula: (Ar₃C⁺), where Ar is aryl or aryl substituted with aheteroatom, a C₁ to C₄₀ hydrocarbyl, or a substituted C₁ to C₄₀hydrocarbyl, preferably the reducible Lewis acid is represented by theformula: (Ph₃C⁺), where Ph is phenyl or phenyl substituted with aheteroatom, a C₁ to C₄₀ hydrocarbyl, or a substituted C₁ to C₄₀hydrocarbyl. In a preferred embodiment, the reducible Lewis acid istriphenyl carbenium.

The anion component A^(d−) include those having the formula[M^(k+)Q_(n)]^(d−) wherein k is 1, 2, or 3; n is 1, 2, 3, 4, 5, or 6,preferably 3, 4, 5 or 6; n−k=d; M is an element selected from Group 13of the Periodic Table of the Elements, preferably boron or aluminum, andQ is independently a hydride, bridged or unbridged dialkylamido, halide,alkoxide, aryloxide, hydrocarbyl, substituted hydrocarbyl, halocarbyl,substituted halocarbyl, and halosubstituted-hydrocarbyl radicals, said Qhaving up to 20 carbon atoms with the proviso that in not more than oneoccurrence is Q a halide, and two Q groups may form a ring structure.Preferably, each Q is a fluorinated hydrocarbyl group having 1 to 20carbon atoms, more preferably each Q is a fluorinated aryl group, andmost preferably each Q is a pentafluoryl aryl group. Examples ofsuitable A^(d−) components also include diboron compounds as disclosedin U.S. Pat. No. 5,447,895, which is fully incorporated herein byreference.

In a preferred embodiment, this invention relates to a method topolymerize olefins comprising contacting olefins (preferably ethylene)with an amidinate catalyst compound, a chain transfer agent and a boroncontaining NCA activator represented by the formula (14):

Z_(d) ⁺(A^(d−))  (14)

where: Z is (L-H) or a reducible Lewis acid; L is an neutral Lewis base(as further described above); H is hydrogen; (L-H) is a Bronsted acid(as further described above); A^(d−) is a boron containingnon-coordinating anion having the charge d⁻ (as further describedabove); d is 1, 2, or 3.

In a preferred embodiment in any NCA's represented by Formula 14described above, the reducible Lewis acid is represented by the formula:(Ar₃C⁺), where Ar is aryl or aryl substituted with a heteroatom, a C₁ toC₄₀ hydrocarbyl, or a substituted C₁ to C₄₀ hydrocarbyl, preferably thereducible Lewis acid is represented by the formula: (Ph₃C⁺), where Ph isphenyl or phenyl substituted with a heteroatom, a C₁ to C₄₀ hydrocarbyl,or a substituted C₁ to C₄₀ hydrocarbyl.

In a preferred embodiment in any of the NCA's represented by Formula 14described above, Z_(d) ⁺ is represented by the formula: (L-H)_(d) ⁺,wherein L is an neutral Lewis base; H is hydrogen; (L-H) is a Bronstedacid; and d is 1, 2, or 3, preferably (L-H)_(d) ⁺ is a Bronsted acidselected from ammoniums, oxoniums, phosphoniums, silyliums, and mixturesthereof.

In a preferred embodiment in any of the NCA's represented by Formula 14described above, the anion component A^(d−) is represented by theformula [M*^(k*+)Q*_(n*)]^(d*−) wherein k* is 1, 2, or 3; n* is 1, 2, 3,4, 5, or 6 (preferably 1, 2, 3, or 4); n*−k*=d*; M* is boron; and Q* isindependently selected from hydride, bridged or unbridged dialkylamido,halide, alkoxide, aryloxide, hydrocarbyl, substituted hydrocarbyl,halocarbyl, substituted halocarbyl, and halosubstituted-hydrocarbylradicals, said Q* having up to 20 carbon atoms with the proviso that innot more than 1 occurrence is Q* a halide.

This invention also relates to a method to polymerize olefins comprisingcontacting olefins (such as ethylene) with an amidinate catalystcompound, a chain transfer agent and an NCA activator represented by theformula (I):

R_(n)M**(ArNHal)_(4-n)  (I)

where R is a monoanionic ligand; M** is a Group 13 metal or metalloid;ArNHal is a halogenated, nitrogen-containing aromatic ring, polycyclicaromatic ring, or aromatic ring assembly in which two or more rings (orfused ring systems) are joined directly to one another or together; andn is 0, 1, 2, or 3. Typically the NCA comprising an anion of Formula Ialso comprises a suitable cation that is essentially non-interferingwith the ionic catalyst complexes formed with the transition metalcompounds, preferably the cation is Z_(d) ⁺ as described above.

In a preferred embodiment in any of the NCA's comprising an anionrepresented by Formula I described above, R is selected from the groupconsisting of substituted or unsubstituted C₁ to C₃₀ hydrocarbylaliphatic or aromatic groups, where substituted means that at least onehydrogen on a carbon atom is replaced with a hydrocarbyl, halide,halocarbyl, hydrocarbyl or halocarbyl substituted organometalloid,dialkylamido, alkoxy, aryloxy, alkysulfido, arylsulfido, alkylphosphido,arylphosphide, or other anionic substituent; fluoride; bulky alkoxides,where bulky means C₄ to C₂₀ hydrocarbyl groups; —SR¹, —NR² ₂, and —PR³₂, where each R¹, R², or R³ is independently a substituted orunsubstituted hydrocarbyl as defined above; or a C₁ to C₃₀ hydrocarbylsubstituted organometalloid.

In a preferred embodiment in any of the NCA's comprising an anionrepresented by Formula I described above, the NCA also comprises cationcomprising a reducible Lewis acid represented by the formula: (Ar₃C⁺),where Ar is aryl or aryl substituted with a heteroatom, a C₁ to C₄₀hydrocarbyl, or a substituted C₁ to C₄₀ hydrocarbyl, preferably thereducible Lewis acid represented by the formula: (Ph₃C⁺), where Ph isphenyl or phenyl substituted with a heteroatom, a C₁ to C₄₀ hydrocarbyl,or a substituted C₁ to C₄₀ hydrocarbyl.

In a preferred embodiment in any of the NCA's comprising an anionrepresented by Formula I described above, the NCA also comprises acation represented by the formula, (L-H)_(d) ⁺, wherein L is an neutralLewis base; H is hydrogen; (L-H) is a Bronsted acid; and d is 1, 2, or3, preferably (L-H)_(d) ⁺ is a Bronsted acid selected from ammoniums,oxoniums, phosphoniums, silyliums, and mixtures thereof.

Further examples of useful activators include those disclosed in U.S.Pat. Nos. 7,297,653 and 7,799,879.

Another activator useful herein comprises a salt of a cationic oxidizingagent and a noncoordinating, compatible anion represented by the formula(16):

(OX^(e+))_(d)(A^(d−))_(e)  (16)

wherein OX^(e+) is a cationic oxidizing agent having a charge of e+; eis 1, 2, or 3; d is 1, 2 or 3; and A^(d−) is a non-coordinating anionhaving the charge of d− (as further described above). Examples ofcationic oxidizing agents include: ferrocenium, hydrocarbyl-substitutedferrocenium, Ag⁺, or Pb⁺². Preferred embodiments of A^(d−) includetetrakis(pentafluorophenyl)borate.

In another embodiment, the catalyst compounds described herein can beused with Bulky activators. A “Bulky activator” as used herein refers toanionic activators represented by the formula:

where:each R₁ is, independently, a halide, preferably a fluoride;each R₂ is, independently, a halide, a C₆ to C₂₀ substituted aromatichydrocarbyl group or a siloxy group of the formula —O—Si—R_(a), whereR_(a) is a C₁ to C₂₀ hydrocarbyl or hydrocarbylsilyl group (preferablyR₂ is a fluoride or a perfluorinated phenyl group);each R₃ is a halide, C₆ to C₂₀ substituted aromatic hydrocarbyl group ora siloxy group of the formula —O—Si—R_(a), where R_(a) is a C₁ to C₂₀hydrocarbyl or hydrocarbylsilyl group (preferably R₃ is a fluoride or aC₆ perfluorinated aromatic hydrocarbyl group); wherein R₂ and R₃ canform one or more saturated or unsaturated, substituted or unsubstitutedrings (preferably R₂ and R₃ form a perfluorinated phenyl ring);L is an neutral Lewis base; (L-H)⁺ is a Bronsted acid; d is 1, 2, or 3;wherein the anion has a molecular weight of greater than 1020 g/mol; andwherein at least three of the substituents on the B atom each have amolecular volume of greater than 250 cubic Å, alternately greater than300 cubic Å, or alternately greater than 500 cubic Å.

“Molecular volume” is used herein as an approximation of spatial stericbulk of an activator molecule in solution. Comparison of substituentswith differing molecular volumes allows the substituent with the smallermolecular volume to be considered “less bulky” in comparison to thesubstituent with the larger molecular volume. Conversely, a substituentwith a larger molecular volume may be considered “more bulky” than asubstituent with a smaller molecular volume.

Molecular volume may be calculated as reported in “A Simple “Back of theEnvelope” Method for Estimating the Densities and Molecular Volumes ofLiquids and Solids,” Journal of Chemical Education, Vol. 71, No. 11,November 1994, pp. 962-964. Molecular volume (MV), in units of cubic A,is calculated using the formula: MV=8.3V_(s), where V_(s) is the scaledvolume. V_(s) is the sum of the relative volumes of the constituentatoms, and is calculated from the molecular formula of the substituentusing the following table of relative volumes. For fused rings, theV_(s) is decreased by 7.5% per fused ring.

Element Relative Volume H 1 1^(st) short period, Li to F 2 2^(nd) shortperiod, Na to Cl 4 1^(st) long period, K to Br 5 2^(nd) long period, Rbto I 7.5 3^(rd) long period, Cs to Bi 9

Exemplary bulky substituents of activators suitable herein and theirrespective scaled volumes and molecular volumes are shown in the tablebelow. The dashed bonds indicate binding to boron, as in the generalformula above.

Molecular Formula of MV Total each Per subst. MV Activator Structure ofboron substituents substituent V_(s) (Å³) (Å³) Dimethylaniliniumtetrakis(perfluoronaphthyl)borate

C₁₀F₇ 34 261 1044 Dimethylanilinium tetrakis(perfluorobiphenyl)borate

C₁₂F₉ 42 349 1396 [4-tButyl-PhNMe₂H] [(C₆F₃(C₆F₅)₂)₄B]

C₁₈F₁₃ 62 515 2060

Exemplary bulky activators useful in catalyst systems herein include:trimethylammonium tetrakis(perfluoronaphthyl)borate, triethylammoniumtetrakis(perfluoronaphthyl)borate, tripropylammoniumtetrakis(perfluoronaphthyl)borate, tri(n-butyl)ammoniumtetrakis(perfluoronaphthyl)borate, tri(t-butyl)ammoniumtetrakis(perfluoronaphthyl)borate, N,N-dimethylaniliniumtetrakis(perfluoronaphthyl)borate, N,N-diethylaniliniumtetrakis(perfluoronaphthyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluoronaphthyl)borate,tropillium tetrakis(perfluoronaphthyl)borate, triphenylcarbeniumtetrakis(perfluoronaphthyl)borate, triphenylphosphoniumtetrakis(perfluoronaphthyl)borate, triethylsilyliumtetrakis(perfluoronaphthyl)borate,benzene(diazonium)tetrakis(perfluoronaphthyl)borate, trimethylammoniumtetrakis(perfluorobiphenyl)borate, triethylammoniumtetrakis(perfluorobiphenyl)borate, tripropylammoniumtetrakis(perfluorobiphenyl)borate, tri(n-butyl)ammoniumtetrakis(perfluorobiphenyl)borate, tri(t-butyl)ammoniumtetrakis(perfluorobiphenyl)borate, N,N-dimethylaniliniumtetrakis(perfluorobiphenyl)borate, N,N-diethylaniliniumtetrakis(perfluorobiphenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluorobiphenyl)borate,tropillium tetrakis(perfluorobiphenyl)borate, triphenylcarbeniumtetrakis(perfluorobiphenyl)borate, triphenylphosphoniumtetrakis(perfluorobiphenyl)borate, triethylsilyliumtetrakis(perfluorobiphenyl)borate,benzene(diazonium)tetrakis(perfluorobiphenyl)borate,[4-t-butyl-PhNMe₂H][(C₆F₃(C₆F₅)₂)₄B], and the types disclosed in U.S.Pat. No. 7,297,653.

Illustrative, but not limiting, examples of boron compounds which may beused as an activator in the processes of this invention are:

trimethylammonium tetraphenylborate, triethylammonium tetraphenylborate,tripropylammonium tetraphenylborate, tri(n-butyl)ammoniumtetraphenylborate, tri(t-butyl) ammonium tetraphenylborate,N,N-dimethylanilinium tetraphenylborate, N,N-diethylaniliniumtetraphenylborate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetraphenylborate, tropilliumtetraphenylborate, triphenylcarbenium tetraphenylborate,triphenylphosphonium tetraphenylborate triethylsilyliumtetraphenylborate, benzene(diazonium)tetraphenylborate,trimethylammonium tetrakis(pentafluorophenyl)borate, triethylammoniumtetrakis(pentafluorophenyl)borate, tripropylammoniumtetrakis(pentafluorophenyl)borate, tri(n-butyl)ammoniumtetrakis(pentafluorophenyl)borate, tri(sec-butyl)ammoniumtetrakis(pentafluorophenyl)borate, N,N-dimethylaniliniumtetrakis(pentafluorophenyl)borate, N,N-diethylaniliniumtetrakis(pentafluorophenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(pentafluorophenyl)borate,tropillium tetrakis(pentafluorophenyl)borate, triphenylcarbeniumtetrakis(pentafluorophenyl)borate, triphenylphosphoniumtetrakis(pentafluorophenyl)borate, triethylsilyliumtetrakis(pentafluorophenyl)borate,benzene(diazonium)tetrakis(pentafluorophenyl)borate, trimethylammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, triethylammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, tripropylammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, tri(n-butyl)ammoniumtetrakis-(2,3,4,6-tetrafluoro-phenyl)borate, dimethyl(t-butyl)ammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-dimethylaniliniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-diethylaniliniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate,tropillium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,triphenylcarbenium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,triphenylphosphonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,triethylsilylium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,benzene(diazonium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate,trimethylammonium tetrakis(perfluoronaphthyl)borate, triethylammoniumtetrakis(perfluoronaphthyl)borate, tripropylammoniumtetrakis(perfluoronaphthyl)borate, tri(n-butyl)ammoniumtetrakis(perfluoronaphthyl)borate, tri(t-butyl)ammoniumtetrakis(perfluoronaphthyl)borate, N,N-dimethylaniliniumtetrakis(perfluoronaphthyl)borate, N,N-diethylaniliniumtetrakis(perfluoronaphthyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluoronaphthyl)borate,tropillium tetrakis(perfluoronaphthyl)borate, triphenylcarbeniumtetrakis(perfluoronaphthyl)borate, triphenylphosphoniumtetrakis(perfluoronaphthyl)borate, triethylsilyliumtetrakis(perfluoronaphthyl)borate,benzene(diazonium)tetrakis(perfluoronaphthyl)borate, trimethylammoniumtetrakis(perfluorobiphenyl)borate, triethylammoniumtetrakis(perfluorobiphenyl)borate, tripropylammoniumtetrakis(perfluorobiphenyl)borate, tri(n-butyl)ammoniumtetrakis(perfluorobiphenyl)borate, tri(t-butyl)ammoniumtetrakis(perfluorobiphenyl)borate, N,N-dimethylaniliniumtetrakis(perfluorobiphenyl)borate, N,N-diethylaniliniumtetrakis(perfluorobiphenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluorobiphenyl)borate,tropillium tetrakis(perfluorobiphenyl)borate, triphenylcarbeniumtetrakis(perfluorobiphenyl)borate, triphenylphosphoniumtetrakis(perfluorobiphenyl)borate, triethylsilyliumtetrakis(perfluorobiphenyl)borate,benzene(diazonium)tetrakis(perfluorobiphenyl)borate, trimethylammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triethylammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tripropylammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tri(n-butyl)ammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tri(t-butyl)ammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dimethylaniliniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-diethylaniliniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,tropillium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triphenylphosphonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triethylsilylium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,benzene(diazonium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, anddialkyl ammonium salts, such as: di-(i-propyl)ammoniumtetrakis(pentafluorophenyl)borate, and dicyclohexylammoniumtetrakis(pentafluorophenyl)borate; and additional tri-substitutedphosphonium salts, such as tri(o-tolyl)phosphoniumtetrakis(pentafluorophenyl)borate, andtri(2,6-dimethylphenyl)phosphonium tetrakis(pentafluorophenyl)borate.

Preferred activators include N,N-dimethylaniliniumtetrakis(perfluoronaphthyl)borate, N,N-dimethylaniliniumtetrakis(perfluorobiphenyl)borate, N,N-dimethylaniliniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triphenylcarbeniumtetrakis(perfluoronaphthyl)borate, triphenylcarbeniumtetrakis(perfluorobiphenyl)borate, triphenylcarbeniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triphenylcarbeniumtetrakis(perfluorophenyl)borate, [Ph₃C⁺][B(C₆F₅)₄ ⁻], [Me₃NH⁺][B(C₆F₅)₄⁻];1-(4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluorophenyl)pyrrolidinium;and tetrakis(pentafluorophenyl)borate,4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluoropyridine.

In a preferred embodiment, the activator comprises a triaryl carbonium(such as triphenylcarbenium tetraphenylborate, triphenylcarbeniumtetrakis(pentafluorophenyl)borate, triphenylcarbeniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, triphenylcarbeniumtetrakis(perfluoronaphthyl)borate, triphenylcarbeniumtetrakis(perfluorobiphenyl)borate, triphenylcarbeniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate).

In another embodiment, the activator comprises one or more oftrialkylammonium tetrakis(pentafluorophenyl)borate, N,N-dialkylaniliniumtetrakis(pentafluorophenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(pentafluorophenyl)borate,trialkylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,N,N-dialkylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,trialkylammonium tetrakis(perfluoronaphthyl)borate, N,N-dialkylaniliniumtetrakis(perfluoronaphthyl)borate, trialkylammoniumtetrakis(perfluorobiphenyl)borate, N,N-dialkylaniliniumtetrakis(perfluorobiphenyl)borate, trialkylammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dialkylaniliniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate,N,N-dialkyl-(2,4,6-trimethylanilinium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,di-(i-propyl)ammonium tetrakis(pentafluorophenyl)borate, (where alkyl ismethyl, ethyl, propyl, n-butyl, sec-butyl, or t-butyl).

In a preferred embodiment, any of the activators described herein may bemixed together before or after combination with the catalyst compound,preferably before being mixed with the catalyst compound.

In some embodiments two NCA activators may be used in the polymerizationand the molar ratio of the first NCA activator to the second NCAactivator can be any ratio. In some embodiments, the molar ratio of thefirst NCA activator to the second NCA activator is 0.01:1 to 10,000:1,preferably 0.1:1 to 1000:1, preferably 1:1 to 100:1.

Further, the typical activator-to-catalyst ratio, e.g., all NCAactivators-to-catalyst ratio is a 1:1 molar ratio. Alternate preferredranges include from 0.1:1 to 100:1, alternately from 0.5:1 to 200:1,alternately from 1:1 to 500:1 alternately from 1:1 to 1000:1. Aparticularly useful range is from 0.5:1 to 10:1, preferably 1:1 to 5:1.

It is also within the scope of this invention that the catalystcompounds can be combined with combinations of alumoxanes and NCA's (seefor example, U.S. Pat. No. 5,153,157, U.S. Pat. No. 5,453,410, EP 0 573120 B1, WO 94/07928, and WO 95/14044 which discuss the use of analumoxane in combination with an ionizing activator).

Optional Scavengers or Co-Activators

In addition to these activator compounds, scavengers or co-activatorsmay be used. Aluminum alkyl or organoaluminum compounds which may beutilized as scavengers or co-activators include, for example,trimethylaluminum, triethylaluminum, triisobutylaluminum,tri-n-hexylaluminum, tri-n-octylaluminum, and diethyl zinc.

Optional Support Materials

In embodiments herein, the catalyst system may comprise an inert supportmaterial. Preferably the supported material is a porous supportmaterial, for example, talc, and inorganic oxides. Other supportmaterials include zeolites, clays, organoclays, or any other organic orinorganic support material and the like, or mixtures thereof.

Preferably, the support material is an inorganic oxide in a finelydivided form. Suitable inorganic oxide materials for use in metallocenecatalyst systems herein include Groups 2, 4, 13, and 14 metal oxides,such as silica, alumina, and mixtures thereof. Other inorganic oxidesthat may be employed either alone or in combination with the silica, oralumina are magnesia, titania, zirconia, and the like. Other suitablesupport materials, however, can be employed, for example, finely dividedfunctionalized polyolefins, such as finely divided polyethylene.Particularly useful supports include magnesia, titania, zirconia,montmorillonite, phyllosilicate, zeolites, talc, clays, and the like.Also, combinations of these support materials may be used, for example,silica-chromium, silica-alumina, silica-titania, and the like. Preferredsupport materials include Al₂O₃, ZrO₂, SiO₂, and combinations thereof,more preferably SiO₂, Al₂O₃, or SiO₂/Al₂O₃.

It is preferred that the support material, most preferably an inorganicoxide, has a surface area in the range of from about 10 to about 700m²/g, pore volume in the range of from about 0.1 to about 4.0 cc/g andaverage particle size in the range of from about 5 to about 500 μm. Morepreferably, the surface area of the support material is in the range offrom about 50 to about 500 m²/g, pore volume of from about 0.5 to about3.5 cc/g and average particle size of from about 10 to about 200 μm.Most preferably the surface area of the support material is in the rangeis from about 100 to about 400 m²/g, pore volume from about 0.8 to about3.0 cc/g and average particle size is from about 5 to about 100 μm. Theaverage pore size of the support material useful in the invention is inthe range of from 10 to 1000 Å, preferably 50 to about 500 Å, and mostpreferably 75 to about 350 Å. In some embodiments, the support materialis a high surface area, amorphous silica (surface area=300 m²/gm; porevolume of 1.65 cm³/gm). Preferred silicas are marketed under thetradenames of DAVISON 952 or DAVISON 955 by the Davison ChemicalDivision of W.R. Grace and Company. In other embodiments DAVISON 948 isused.

The support material should be dry, that is, free of absorbed water.Drying of the support material can be effected by heating or calciningat about 100° C. to about 1000° C., preferably at least about 600° C.When the support material is silica, it is heated to at least 200° C.,preferably about 200° C. to about 850° C., and most preferably at about600° C.; and for a time of about 1 minute to about 100 hours, from about12 hours to about 72 hours, or from about 24 hours to about 60 hours.The calcined support material must have at least some reactive hydroxyl(OH) groups to produce supported catalyst systems of this invention. Thecalcined support material is then contacted with at least onepolymerization catalyst comprising at least one metallocene compound andan activator.

The support material, having reactive surface groups, typically hydroxylgroups, is slurried in a non-polar solvent and the resulting slurry iscontacted with a solution of a metallocene compound and an activator. Insome embodiments, the slurry of the support material is first contactedwith the activator for a period of time in the range of from about 0.5hours to about 24 hours, from about 2 hours to about 16 hours, or fromabout 4 hours to about 8 hours. The solution of the metallocene compoundis then contacted with the isolated support/activator. In someembodiments, the supported catalyst system is generated in situ. Inalternate embodiment, the slurry of the support material is firstcontacted with the catalyst compound for a period of time in the rangeof from about 0.5 hours to about 24 hours, from about 2 hours to about16 hours, or from about 4 hours to about 8 hours. The slurry of thesupported metallocene compound is then contacted with the activatorsolution.

The mixture of the metallocene, activator and support is heated to about0° C. to about 70° C., preferably to about 23° C. to about 60° C.,preferably at room temperature. Contact times typically range from about0.5 hours to about 24 hours, from about 2 hours to about 16 hours, orfrom about 4 hours to about 8 hours.

Suitable non-polar solvents are materials in which all of the reactantsused herein, i.e., the activator, and the metallocene compound, are atleast partially soluble and which are liquid at reaction temperatures.Preferred non-polar solvents are alkanes, such as isopentane, hexane,n-heptane, octane, nonane, and decane, although a variety of othermaterials including cycloalkanes, such as cyclohexane, aromatics, suchas benzene, toluene, and ethylbenzene, may also be employed.

Polymerization Processes

In embodiments herein, the invention relates to polymerization processeswhere monomer (such as propylene), and optionally comonomer, arecontacted with a catalyst system comprising an activator and at leastone metallocene compound, as described above. The catalyst compound andactivator may be combined in any order, and are combined typically priorto contacting with the monomer.

Monomers useful herein include substituted or unsubstituted C₂ to C₄₀alpha olefins, preferably C₂ to C₂₀ alpha olefins, preferably C₂ to C₁₂alpha olefins, preferably ethylene, propylene, butene, pentene, hexene,heptene, octene, nonene, decene, undecene, dodecene and isomers thereof.In a preferred embodiment of the invention, the monomer comprisespropylene and optional comonomers comprising one or more of ethylene orC₄ to C₄₀ olefins, preferably C₄ to C₂₀ olefins, or preferably C₆ to C₁₂olefins. The C₄ to C₄₀ olefin monomers may be linear, branched, orcyclic. The C₄ to C₄₀ cyclic olefins may be strained or unstrained,monocyclic or polycyclic, and may optionally include heteroatoms and/orone or more functional groups. In another preferred embodiment, themonomer comprises ethylene and an optional comonomers comprising one ormore C₃ to C₄₀ olefins, preferably C₄ to C₂₀ olefins, or preferably C₆to C₁₂ olefins. The C₃ to C₄₀ olefin monomers may be linear, branched,or cyclic. The C₃ to C₄₀ cyclic olefins may be strained or unstrained,monocyclic or polycyclic, and may optionally include heteroatoms and/orone or more functional groups.

Exemplary C₂ to C₄₀ olefin monomers and optional comonomers includeethylene, propylene, butene, pentene, hexene, heptene, octene, nonene,decene, undecene, dodecene, norbornene, norbornadiene,dicyclopentadiene, cyclopentene, cycloheptene, cyclooctene,cyclooctadiene, cyclododecene, 7-oxanorbornene, 7-oxanorbornadiene,substituted derivatives thereof, and isomers thereof, preferably hexene,heptene, octene, nonene, decene, dodecene, cyclooctene,1,5-cyclooctadiene, 1-hydroxy-4-cyclooctene, 1-acetoxy-4-cyclooctene,5-methylcyclopentene, cyclopentene, dicyclopentadiene, norbornene,norbornadiene, and their respective homologs and derivatives, preferablynorbornene, norbornadiene, and dicyclopentadiene.

In a preferred embodiment one or more dienes are present in the polymerproduced herein at up to 10 weight %, preferably at 0.00001 to 1.0weight %, preferably 0.002 to 0.5 weight %, even more preferably 0.003to 0.2 weight %, based upon the total weight of the composition. In someembodiments 500 ppm or less of diene is added to the polymerization,preferably 400 ppm or less, preferably or 300 ppm or less. In otherembodiments at least 50 ppm of diene is added to the polymerization, or100 ppm or more, or 150 ppm or more.

Preferred diolefin monomers useful in this invention include anyhydrocarbon structure, preferably C₄ to C₃₀, having at least twounsaturated bonds, wherein at least two of the unsaturated bonds arereadily incorporated into a polymer by either a stereospecific or anon-stereospecific catalyst(s). It is further preferred that thediolefin monomers be selected from alpha, omega-diene monomers (i.e.di-vinyl monomers). More preferably, the diolefin monomers are lineardi-vinyl monomers, most preferably those containing from 4 to 30 carbonatoms. Examples of preferred dienes include butadiene, pentadiene,hexadiene, heptadiene, octadiene, nonadiene, decadiene, undecadiene,dodecadiene, tridecadiene, tetradecadiene, pentadecadiene,hexadecadiene, heptadecadiene, octadecadiene, nonadecadiene, icosadiene,heneicosadiene, docosadiene, tricosadiene, tetracosadiene,pentacosadiene, hexacosadiene, heptacosadiene, octacosadiene,nonacosadiene, triacontadiene, particularly preferred dienes include1,6-heptadiene, 1,7-octadiene, 1,8-nonadiene, 1,9-decadiene,1,10-undecadiene, 1,11-dodecadiene, 1,12-tridecadiene,1,13-tetradecadiene, and low molecular weight polybutadienes (Mw lessthan 1000 g/mol). Preferred cyclic dienes include cyclopentadiene,vinylnorbornene, norbornadiene, ethylidene norbornene, divinylbenzene,dicyclopentadiene or higher ring containing diolefins with or withoutsubstituents at various ring positions.

In some embodiments, where butene is the comonomer, the butene sourcemay be a mixed butene stream comprising various isomers of butene. The1-butene monomers are expected to be preferentially consumed by thepolymerization process. Use of such mixed butene streams will provide aneconomic benefit, as these mixed streams are often waste streams fromrefining processes, for example, C₄ raffinate streams, and can thereforebe substantially less expensive than pure 1-butene.

Polymerization processes of this invention can be carried out in anymanner known in the art. Any suspension, homogeneous, bulk, solution(including supercritical), slurry, or gas phase polymerization processknown in the art can be used. Such processes can be run in a batch,semi-batch, or continuous mode. Homogeneous polymerization processes andslurry processes are preferred. (A homogeneous polymerization process isdefined to be a process where at least 90 wt % of the product is solublein the reaction media.) A bulk homogeneous process is particularlypreferred. (A bulk process is defined to be a process where monomerconcentration in all feeds to the reactor is 70 volume % or more.)Alternately, no solvent or diluent is present or added in the reactionmedium, (except for the small amounts used as the carrier for thecatalyst system or other additives, or amounts typically found with themonomer; e.g., propane in propylene). In another embodiment, the processis a slurry process. As used herein the term “slurry polymerizationprocess” means a polymerization process where a supported catalyst isemployed and monomers are polymerized on the supported catalystparticles. At least 95 wt % of polymer products derived from thesupported catalyst are in granular form as solid particles (notdissolved in the diluent).

Suitable diluents/solvents for polymerization include non-coordinating,inert liquids. Examples include straight and branched-chainhydrocarbons, such as isobutane, butane, pentane, isopentane, hexanes,isohexane, heptane, octane, dodecane, and mixtures thereof; cyclic andalicyclic hydrocarbons, such as cyclohexane, cycloheptane,methylcyclohexane, methylcycloheptane, and mixtures thereof, such as canbe found commercially (Isopar™); perhalogenated hydrocarbons, such asperfluorinated C₄₋₁₀ alkanes, chlorobenzene, and aromatic andalkylsubstituted aromatic compounds, such as benzene, toluene,mesitylene, and xylene. Suitable solvents also include liquid olefinswhich may act as monomers or comonomers including ethylene, propylene,1-butene, 1-hexene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene,1-octene, 1-decene, and mixtures thereof. In a preferred embodiment,aliphatic hydrocarbon solvents are used as the solvent, such asisobutane, butane, pentane, isopentane, hexanes, isohexane, heptane,octane, dodecane, and mixtures thereof; cyclic and alicyclichydrocarbons, such as cyclohexane, cycloheptane, methylcyclohexane,methylcycloheptane, and mixtures thereof. In another embodiment, thesolvent is not aromatic, preferably aromatics are present in the solventat less than 1 wt %, preferably less than 0.5 wt %, preferably less than0 wt % based upon the weight of the solvents.

In a preferred embodiment, the feed concentration of the monomers andcomonomers for the polymerization is 60 vol % solvent or less,preferably 40 vol % or less, or preferably 20 vol % or less, based onthe total volume of the feedstream. Preferably the polymerization is runin a bulk process.

Preferred polymerizations can be run at any temperature and/or pressuresuitable to obtain the desired ethylene polymers. Typical temperaturesand/or pressures include a temperature in the range of from about 0° C.to about 300° C., preferably about 20° C. to about 200° C., preferablyabout 35° C. to about 150° C., preferably from about 40° C. to about120° C., preferably from about 45° C. to about 80° C.; and at a pressurein the range of from about 0.35 MPa to about 10 MPa, preferably fromabout 0.45 MPa to about 6 MPa, or preferably from about 0.5 MPa to about4 MPa.

In a typical polymerization, the run time of the reaction is up to 300minutes, preferably in the range of from about 5 to 250 minutes, orpreferably from about 10 to 120 minutes.

In some embodiments hydrogen is present in the polymerization reactor ata partial pressure of 0.001 to 50 psig (0.007 to 345 kPa), preferablyfrom 0.01 to 25 psig (0.07 to 172 kPa), more preferably 0.1 to 10 psig(0.7 to 70 kPa). In some embodiments hydrogen is not added thepolymerization reactor, i.e. hydrogen may be present from other sources,such as a hydrogen generating catalyst, but none is added to thereactor.

In an embodiment of the invention, the activity of the catalyst is atleast 50 g/mmol/hour, preferably 500 g/mmol/hour or more, preferably5000 g/mmol/hr or more, preferably 50,000 g/mmol/hr or more, preferably100,000 g/mmol/hr or more, preferably 150,000 g/mmol/hr or more,preferably 200,000 g/mmol/hr or more, preferably 250,000 g/mmol/hr ormore, preferably 300,000 g/mmol/hr or more, preferably 350,000 g/mmol/hror more. In an alternate embodiment, the conversion of olefin monomer isat least 10%, based upon polymer yield and the weight of the monomerentering the reaction zone, preferably 20% or more, preferably 30% ormore, preferably 50% or more, preferably 80% or more.

In a preferred embodiment, little or no scavenger is used in the processto produce the ethylene polymer. Preferably, scavenger (such as trialkyl aluminum) is present at zero mol %, alternately the scavenger ispresent at a molar ratio of scavenger metal to transition metal of lessthan 100:1, preferably less than 50:1, preferably less than 15:1,preferably less than 10:1.

In a preferred embodiment, the polymerization: 1) is conducted attemperatures of 0 to 300° C. (preferably 25 to 150° C., preferably 40 to120° C., preferably 45 to 80° C.); 2) is conducted at a pressure ofatmospheric pressure to 10 MPa (preferably 0.35 to 10 MPa, preferablyfrom 0.45 to 6 MPa, preferably from 0.5 to 4 MPa); 3) is conducted in analiphatic hydrocarbon solvent (such as isobutane, butane, pentane,isopentane, hexanes, isohexane, heptane, octane, dodecane, and mixturesthereof; cyclic and alicyclic hydrocarbons, such as cyclohexane,cycloheptane, methylcyclohexane, methylcycloheptane, and mixturesthereof; preferably where aromatics are preferably present in thesolvent at less than 1 wt %, preferably less than 0.5 wt %, preferablyat 0 wt % based upon the weight of the solvents); 4) wherein thecatalyst system used in the polymerization comprises less than 0.5 mol%, preferably 0 mol % alumoxane, alternately the alumoxane is present ata molar ratio of aluminum to transition metal less than 500:1,preferably less than 300:1, preferably less than 100:1, preferably lessthan 1:1; 5) the polymerization preferably occurs in one reaction zone;6) the productivity of the catalyst compound is at least 80,000g/mmol/hr (preferably at least 150,000 g/mmol/hr, preferably at least200,000 g/mmol/hr, preferably at least 250,000 g/mmol/hr, preferably atleast 300,000 g/mmol/hr); 7) optionally scavengers (such as trialkylaluminum compounds) are absent (e.g. present at zero mol %, alternatelythe scavenger is present at a molar ratio of scavenger metal totransition metal of less than 100:1, preferably less than 50:1,preferably less than 15:1, preferably less than 10:1); and 8) optionallyhydrogen is present in the polymerization reactor at a partial pressureof 0.001 to 50 psig (0.007 to 345 kPa) (preferably from 0.01 to 25 psig(0.07 to 172 kPa), more preferably 0.1 to 10 psig (0.7 to 70 kPa)). In apreferred embodiment, the catalyst system used in the polymerizationcomprises no more than one catalyst compound. A “reaction zone” alsoreferred to as a “polymerization zone” is a vessel where polymerizationtakes place, for example a batch reactor. When multiple reactors areused in either series or parallel configuration, each reactor isconsidered as a separate polymerization zone. For a multi-stagepolymerization in both a batch reactor and a continuous reactor, eachpolymerization stage is considered as a separate polymerization zone. Ina preferred embodiment, the polymerization occurs in one reaction zone.Room temperature is 23° C. unless otherwise noted.

Other additives may also be used in the polymerization, as desired, suchas one or more scavengers, promoters, modifiers, chain transfer agents(such as diethyl zinc), reducing agents, oxidizing agents, hydrogen,aluminum alkyls, or silanes.

Gas Phase Polymerization

Generally, in a fluidized gas phase process for producing polymers, agaseous stream containing one or more monomers is continuously cycledthrough a fluidized bed in the presence of a catalyst under reactiveconditions. The gaseous stream is withdrawn from the fluidized bed andrecycled back into the reactor. Simultaneously, polymer product iswithdrawn from the reactor and fresh monomer is added to replace thepolymerized monomer. Illustrative gas phase polymerization processes canbe as discussed and described in U.S. Pat. Nos. 4,543,399; 4,588,790;5,028,670; 5,317,036; 5,352,749; 5,405,922; 5,436,304; 5,453,471;5,462,999; 5,616,661; and 5,668,228.

The reactor pressure in a gas phase process can vary from about 69 kPato about 3,450 kPa, about 690 kPa to about 3,450 kPa, about 1,380 kPa toabout 2,759 kPa, or about 1,724 kPa to about 2,414 kPa.

The reactor temperature in the gas phase process can vary from about 30°C. to about 120° C., preferably from about 60° C. to about 115° C., morepreferably in the range of from about 65° C. to 110° C., and mostpreferably in the range of from about 70° C. to about 95° C. In anotherembodiment, when high density polyethylene is desired the reactortemperature is typically between about 70° C. and about 105° C.

The productivity of the catalyst or catalyst system in a gas phasesystem is influenced by the partial pressure of the main monomer. Thepreferred mole percent of the main monomer, ethylene or propylene,preferably ethylene, is from about 25 mol % to about 90 mol % and thecomonomer partial pressure is from about 138 kPa to about 5,000 kPa,preferably about 517 kPa to about 2,069 kPa, which are typicalconditions in a gas phase polymerization process. Also in some systemsthe presence of comonomer can increase productivity.

In a preferred embodiment, the reactor can be capable of producing morethan 227 kilograms polymer per hour (kg/hr) to about 90,900 kg/hr orhigher, preferably greater than 455 kg/hr, more preferably greater than4,540 kg/hr, even more preferably greater than 11,300 kg/hr, still morepreferably greater than 15,900 kg/hr, still even more preferably greaterthan 22,700 kg/hr, and preferably greater than 29,000 kg/hr to greaterthan 45,500 kg/hr, and most preferably over 45,500 kg/hr.

The polymerization in a stirred bed can take place in one or twohorizontal stirred vessels according to the polymerization mode. Thereactors can be subdivided into individuallygas-composition-controllable and/orpolymerization-temperature-controllable polymerization compartments.With continuous catalyst injection, essentially at one end of thereactor, and powder removal at the other end, the residence timedistribution approaches that of plug flow reactor. Preferably thefluorocarbon, if present, is introduced into the first stirred vessel.

Other gas phase processes contemplated by the processes discussed anddescribed herein can include those described in U.S. Pat. Nos.5,627,242; 5,665,818; and 5,677,375; and European Patent ApplicationPublications EP-A-0 794 200; EP-A-0 802 202; and EP-B-634 421.

In another preferred embodiment the catalyst system is in liquid,suspension, dispersion, and/or slurry form and can be introduced intothe gas phase reactor into a resin particle lean zone. Introducing aliquid, suspension, dispersion, and/or slurry catalyst system into afluidized bed polymerization into a particle lean zone can be asdiscussed and described in U.S. Pat. No. 5,693,727.

In some embodiments, the gas phase polymerization can operate in theabsence of fluorocarbon. In some embodiments, the gas phasepolymerization can be conducted in the presence of a fluorocarbon.Generally speaking, the fluorocarbons can be used as polymerizationmedia and/or as condensing agents.

Slurry Phase Polymerization

A slurry polymerization process generally operates at a pressure rangebetween about 103 kPa to about 5,068 kPa or even greater and atemperature from about 0° C. to about 120° C. In a slurrypolymerization, a suspension of solid, particulate polymer is formed ina liquid polymerization diluent medium to which monomer and comonomersalong with catalyst are added. The suspension including diluent isintermittently or continuously removed from the reactor where thevolatile components are separated from the polymer and recycled,optionally after a distillation, to the reactor. The liquid diluentemployed in the polymerization medium is typically an alkane mediumhaving from about 3 to about 7 carbon atoms, preferably a branchedalkane. The medium employed can be liquid under the conditions ofpolymerization and relatively inert. When a propane medium is used theprocess can be operated above the reaction diluent critical temperatureand pressure. Preferably, a hexane or an isobutane medium is employed.

In one embodiment, a preferred polymerization technique, referred to asa particle form polymerization or a slurry process, can includemaintaining the temperature below the temperature at which the polymergoes into solution. Such technique is well known in the art, and can beas discussed and described in U.S. Pat. No. 3,248,179. The preferredtemperature in the particle form process can be from about 20° C. toabout 110° C. Two preferred polymerization processes for the slurryprocess can include those employing a loop reactor and those utilizing aplurality of stirred reactors in series, parallel, or combinationsthereof. Non-limiting examples of slurry processes include continuousloop or stirred tank processes. Also, other examples of slurry processescan be as discussed and described in U.S. Pat. No. 4,613,484.

In another embodiment, the slurry process can be carried outcontinuously in a loop reactor. The catalyst, as a slurry in mineral oiland/or paraffinic hydrocarbon or as a dry, free flowing powder, can beinjected regularly to the reactor loop, which can be filled with acirculating slurry of growing polymer particles in a diluent containingmonomer and comonomer. Hydrogen, optionally, can be added as a molecularweight control. The reactor can be operated at a pressure of about 3,620kPa to about 4,309 kPa and at a temperature from about 60° C. to about115° C. depending on the desired polymer melting characteristics.Reaction heat can be removed through the loop wall since much of thereactor is in the form of a double-jacketed pipe. The slurry is allowedto exit the reactor at regular intervals or continuously to a heated lowpressure flash vessel, rotary dryer, and a nitrogen purge column insequence for removal of the diluent and at least a portion of anyunreacted monomer and/or comonomers. The resulting hydrocarbon freepowder can be compounded for use in various applications.

The reactor used in the slurry process can produce greater than 907kg/hr, more preferably greater than 2,268 kg/hr, and most preferablygreater than 4,540 kg/hr polymer. In another embodiment the slurryreactor can produce greater than 6,804 kg/hr, preferably greater than11,340 kg/hr to about 45,500 kg/hr. The reactor used in the slurryprocess can be at a pressure from about 2,758 kPa to about 5,516 kPa,preferably about 3,103 kPa to about 4,827 kPa, more preferably fromabout 3,448 kPa to about 4,482 kPa, most preferably from about 3,620 kPato about 4,309 kPa.

The concentration of the predominant monomer in the reactor liquidmedium in the slurry process can be from about 1 wt % to about 30 wt %,preferably from about 2 wt % to about 15 wt %, more preferably fromabout 2.5 wt % to about 10 wt %, most preferably from about 3 wt % toabout 20 wt %.

In one or more embodiments, the slurry and/or gas phase polymerizationcan be operated in the absence of or essentially free of any scavengers,such as triethylaluminum, trimethylaluminum, tri-isobutylaluminum andtri-n-hexylaluminum and diethyl aluminum chloride, dibutyl zinc and thelike. Operation of the slurry and/or gas phase reactors in the absenceor essentially free of any scavengers can be as discussed and describedin WO Publication No. WO 96/08520 and U.S. Pat. No. 5,712,352. Inanother embodiment the polymerization processes can be run withscavengers. Typical scavengers include trimethyl aluminum, tri-ethylaluminum, tri-isobutyl aluminum, tri-n-octyl aluminum, and an excess ofalumoxane and/or modified alumoxane.

In some embodiments, the slurry phase polymerization can operate in theabsence of a fluorocarbon. In some embodiments, the slurry phasepolymerization can be conducted in the presence of a fluorocarbon.Generally speaking the fluorocarbons can be used as polymerizationmedia.

Solution Phase Polymerization

As used herein, the phrase “solution phase polymerization” refers to apolymerization system where the polymer produced is soluble in thepolymerization medium. Generally this involves polymerization in acontinuous reactor in which the polymer formed and the starting monomerand catalyst materials supplied, are agitated to reduce or avoidconcentration gradients and in which the monomer acts as a diluent orsolvent or in which a hydrocarbon is used as a diluent or solvent.Suitable processes typically operate at temperatures from about 0° C. toabout 250° C., preferably from about 10° C. to about 150° C., morepreferably from about 40° C. to about 140° C., more preferably fromabout 50° C. to about 120° C. and at pressures of about 0.1 MPa or more,preferably 2 MPa or more. The upper pressure limit is not criticallyconstrained but typically can be about 200 MPa or less, preferably, 120MPa or less. Temperature control in the reactor can generally beobtained by balancing the heat of polymerization and with reactorcooling by reactor jackets or cooling coils to cool the contents of thereactor, auto refrigeration, pre-chilled feeds, vaporization of liquidmedium (diluent, monomers or solvent) or combinations of all three.Adiabatic reactors with pre-chilled feeds can also be used. The purity,type, and amount of solvent can be optimized for the maximum catalystproductivity for a particular type of polymerization. The solvent can bealso introduced as a catalyst carrier. The solvent can be introduced asa gas phase or as a liquid phase depending on the pressure andtemperature. Advantageously, the solvent can be kept in the liquid phaseand introduced as a liquid. Solvent can be introduced in the feed to thepolymerization reactors.

In a preferred embodiment, the polymerization process can be describedas a continuous, non-batch process that, in its steady state operation,is exemplified by removal of amounts of polymer made per unit time,being substantially equal to the amount of polymer withdrawn from thereaction vessel per unit time. By “substantially equal” we intend thatthese amounts, polymer made per unit time, and polymer withdrawn perunit time, are in ratios of one to other, of from 0.9:1; or 0.95:1; or0.97:1; or 1:1. In such a reactor, there will be a substantiallyhomogeneous monomer distribution.

Preferably in a continuous process, the mean residence time of thecatalyst and polymer in the reactor generally can be from about 5minutes to about 8 hours, and preferably from about 10 minutes to about6 hours, more preferably from 10 minutes to 1 hour. In some embodiments,comonomer (such as ethylene) can be added to the reaction vessel in anamount to maintain a differential pressure in excess of the combinedvapor pressure of the main monomer (such as a propylene) and anyoptional diene monomers present.

In another embodiment, the polymerization process can be carried out ata pressure of ethylene of from about 68 kPa to about 6,800 kPa, mostpreferably from about 272 to about 5,440 kPa). The polymerization isgenerally conducted at a temperature of from about 25° C. to about 250°C., preferably from about 75° C. to about 200° C., and most preferablyfrom about 95° C. to about 200° C.

The addition of a small amount of hydrocarbon to a typical solutionphase process can cause the polymer solution viscosity to drop and orthe amount of polymer solute to increase. Addition of a larger amount ofsolvent in a traditional solution process can cause the separation ofthe polymer into a separate phase (which can be solid or liquid,depending on the reaction conditions, such as temperature or pressure).

The processes discussed and described herein can be carried out incontinuous stirred tank reactors, batch reactors, or plug flow reactors.One reactor can be used even if sequential polymerizations are beingperformed, preferably as long as there is separation in time or space ofthe two reactions. Likewise two or more reactors operating in series orparallel can also be used. These reactors can have or not have internalcooling and the monomer feed may or may not be refrigerated. See thegeneral disclosure of U.S. Pat. No. 5,001,205 for general processconditions. See also, WO Publication Nos. WO 96/33227 and WO 97/22639.

As previously noted, the processes described above can optionally usemore than one reactor. The use of a second reactor is especially usefulin those embodiments in which an additional catalyst, especially aZiegler-Natta or chrome catalyst, or by proper selection of processconditions, including catalyst selection, polymers with tailoredproperties can be produced. The cocatalysts and optional scavengercomponents in the process can be independently mixed with the catalystcomponent before introduction into the reactor, or they can eachindependently be fed into the reactor using separate streams, resultingin “in reactor” activation. Each of the above processes can be employedin single reactor, parallel or series reactor configurations. In seriesoperation, the second reactor temperature is preferably higher than thefirst reactor temperature. In parallel reactor operation, thetemperatures of the two reactors can be independent. The pressure canvary from about 0.1 kPa to about 250 MPa, preferably from about 0.01 MPato about 160 MPa, most preferably from 0.1 MPa to about 50 MPa. Theliquid processes can include contacting olefin monomers with any one ormore of the catalyst systems discussed and described herein in asuitable diluent or solvent and allowing the monomers to react for asufficient time to produce the desired polymers. In multiple reactorprocesses the solvent can be introduced into one or all of the reactors.In particular, a first solvent can be introduced into the first reactor,and a second solvent, which can be the same or different from the firstsolvent, can be introduced into the second reactor. Likewise the solventcan be introduced in the first reactor alone or the second reactoralone. In addition to the above, in multiple reactor configurationswhere there is a third, fourth or fifth reactor, the solvent can beintroduced into all of the third, fourth and fifth reactors, none of thethird, fourth and fifth reactors, just the third reactor, just thefourth reactor, just the fifth reactor, just the third and fourthreactors, just the third and fifth reactors, or just the fourth andfifth reactors. Likewise, any solvent introduced to any of the third,fourth, and/or fifth reactors can be the same or different as the firstand/or second solvents.

In another embodiment, a sequential polymerization process is used andthe first polymerization is a slurry process to produce homopolymerfollowed by another slurry reactor for impact copolymer (ICP)production. Impact copolymers can be produced by first makinghomopolypropylene in a slurry reactor, and transferring thehomopolypropylene to another slurry reactor where copolymers areproduced with the presence of homopolypropylene. Fluorocarbon can beintroduced into the first reactor, the second reactor or both. Thecatalyst compounds described herein may be used in the first step forICP production to produce thermoplastic polymer such ashomopolypropylene or may be used in the second step to producethermoplastic polymer such as a copolymer of propylene and ethylene.

In another embodiment, the two (or more) polymerizations can occur inthe same reactor but in different reaction zones. For example, anotherpreferred embodiment is process to prepare impact copolymers comprisingproducing a semi-crystalline polymer in a first reaction zone and thentransferring the semi-crystalline polymer to a second reaction zonewhere a low crystallinity polymer can be produced in the presence of thesemi-crystalline polymer.

In any of the embodiments above the first reactor and second reactor canbe reaction zones in the same reactor. Reactors where multiple reactionzones are possible include Spherizone™ type reactors and those describedin U.S. Pat. No. 6,413,477.

In a particular embodiment, the impact copolymer can be produced in situwithin three reactors, where a first polypropylene is produced in afirst reactor, a second polypropylene is produced in a second reactor,and the ethylene copolymer or elastomeric polymer is produced in a thirdreactor, with each reactor associated in series. In another particularembodiment, the impact copolymer can be produced in situ within threereactors, where the first polypropylene is produced in the first reactorwith a first catalyst composition and the second polypropylene isproduced in the second reactor with a second catalyst composition, wherethe first and second catalyst compositions differ from one another, andthe elastomeric polymer is produced in the third reactor, each reactorassociated in series.

In a particular embodiment, the first and second reactors can beslurry-loop reactors and the third reactor can be a gas phase reactor.The first and second reactors can produce the polypropylenes,homopolymers in a particular embodiment, and the gas phase reactor canproduce the ethylene copolymer or elastomeric polymer, thus creating anin situ blend of the ethylene copolymer in the polypropylene matrix. Theimpact copolymer can include from a low of about 30 wt %, about 35 wt %,or about 40 wt % to a high of about 60 wt %, about 65 wt %, or about 70wt % of the first polypropylene, based on the total weight of the impactcopolymer. The impact copolymer can also include from a low of about 10wt %, about 15 wt %, or about 20 wt % to a high of about 30 wt %, about35 wt %, or about 40 wt % of the second polypropylene, based on thetotal weight of the impact copolymer. The impact copolymer can alsoinclude from a low of about 15 wt %, about 20 wt %, or about 22 wt % toa high of about 26 wt %, about 30 wt %, or about 35 wt % of the ethylenecopolymer, based on the total weight of the impact copolymer. Theseamounts can be achieved, in the case where one or more reactors is usedto produce the propylene impact copolymer, by any suitable means knownto those skilled in the art including control of the residence time ineach stage and/or reactor, the amount and/or particular catalystcomposition(s), variation in the reactants in each stage and/or reactor(i.e., propylene, comonomer, hydrogen, etc. concentrations),combinations of these, and/or any other means.

In embodiments where one or more reactors are used to produce the impactcopolymer(s), one or more chain terminating agent(s) (e.g., hydrogen)can be used to control the melt flow rate (MFR) of the polypropylene(s).The chain terminating agents can be used as a means of adjusting the MFRof components of the impact copolymer either alone or in conjunctionwith other means. In a particular embodiment, the process of producingthe impact copolymer can include contacting a catalyst with propylene, afirst amount of a chain terminating agent, and optionally one or morecomonomers, e.g., ethylene and/or C₄ to C₁₂ α-olefins, in a firstreactor to form a first polypropylene comprising no more than 5 wt % ofethylene and/or α-olefin derived units, based on the weight of the firstpolypropylene. The catalyst and the first polypropylene can be contactedwith propylene, a second amount of a chain terminating agent, andoptionally one or more comonomers, e.g., ethylene and/or C₄ to C₁₂α-olefins in a second reactor to form a second polypropylene comprisingno more than 5 wt % of ethylene and/or α-olefin derived units, based onthe weight of the second polypropylene. The second amount of chainterminating agent can be greater than the first amount of chainterminating agent. Finally, the catalyst composition, the firstpolypropylene, and the second polypropylene can be contacted withpropylene and ethylene in a third reactor to form an ethylene-propylenecopolymer that includes from about 35 wt % or about 40 wt % or about 45wt % to about 60 wt % or about 65 wt %, or about 70 wt %ethylene-derived units, based on the weight of the impact copolymer.

The first amount of the chain terminating agent can be added to the oneor more reactors and/or one or more stages within the reactor(s) suchthat the first polypropylene has an MFR₁ from a low of about 8 dg/min,about 15 dg/min, or about 18 dg/min to a high of about 33 dg/min, about35 dg/min, or about 40 dg/min. The second amount of chain terminatingagent can be added (in certain embodiments) such that the secondpolypropylene has an MFR₂ from a low of about 50 dg/min, about 65dg/min, or about 70 dg/min to a high of about 100 dg/min, about 120dg/min, or about 190 dg/min. Described another way, the second amount ofchain terminating agent (in certain embodiments) can be greater than thefirst amount of chain terminating agent such that the MFR₁ of the firstpolypropylene is at least 30% less, at least 35% less, at least 40%less, at least 45% less, or at least 50% less than the MFR₂ of thesecond polypropylene. Stated in yet another way, the chain terminatingagent(s) can be added to the reactor(s) such that MFR₂/MFR₁ is from alow of about 2, about 2.5, or about 3 to a high of about 4, about 4.5,about 5, or about 6 in certain embodiments, and greater than 1.5,greater than 2.0, greater than 2.5, or greater than 3 in otherembodiments. The amount of chain terminating agent can be varied by anysuitable means in the reactor(s), and in one embodiment the amount ofthe first chain terminating agent can be less than 2,000 mol ppm or lessthan 1,800 mol ppm as measured in the first propylene feed to thereactor, and the amount of the second chain terminating agent can begreater than 2,500 mol ppm or greater than 2,800 mol ppm as measured inthe second propylene feed to the reactor.

In certain embodiments of the three reactor process, catalystcomponents, propylene, chain terminating agent, and any other optionalmonomers can be fed to a first loop reactor for a firsthomopolymerization or copolymerization process. The high heat removalcapability of the loop reactor can cause or facilitate turbulent mixingof the slurry and the large surface-to-volume ratio of the reactor canenable high specific outputs. Operating conditions are typically in therange of about 60° C. to about 80° C., about 500 psi to about 700 psi,and an amount of chain terminating agent, hydrogen in a preferredembodiment, of less than about 2,000 mol ppm or less than about 1,800mol ppm as measured in the propylene feed to the reactor, and within therange from about 1,000 mol ppm, about 1,100 mol ppm, or about 1,200 molppm to about 1,800 mol ppm, or about 2,000 mol ppm in anotherembodiment. The polymer produced from the first reactor (along withresidual chain terminating agent and monomers) can be transferred to asecond loop reactor where the operating conditions can be the same ordifferent with respect to the first loop reactor. Additional monomer,chain terminating agent, and optional comonomer can be added also. In aparticular embodiment, at least the amount of the second chainterminating agent will be different, where the amount of chainterminating agent, hydrogen in a preferred embodiment, is greater than2,500 mol ppm or greater than 2,800 mol ppm as measured in the propylenefeed to the second reactor, and within the range of about 2,500 mol ppm,about 3,000 mol ppm, or about 3,400 mol ppm to about 3,600 mol ppm, orabout 4,000 mol ppm in another embodiment.

Upon exiting the second loop reactor, the polypropylene slurry can bedepressurized and flashed at a pressure that allows for recycle of thevaporized monomer(s) by condensation using cooling water or othercooling means, and can be sufficient for gas phase polymerization. Thepolypropylene and catalyst composition mixture can be transferred to agas phase reactor. The ethylene copolymer or elastomeric polymer can beproduced within this gas phase reactor in certain embodiments. Theethylene copolymer, an ethylene-propylene copolymer in a preferredembodiment, can be produced in a particular embodiment by use of afluidized bed gas phase reactor operating at a temperature from a low ofabout 50° C., about 60° C., or about 70° C. to a high of about 80° C.,about 90° C., about 100° C., about 110° C., or about 120° C., andpressures from a low of about 100 psi, about 125 psi, or about 150 psito a high of about 200 psi, about 250 psi, or about 300 psi. Polymerexiting the polymerization section can pass through a low pressureseparator, in which the remaining monomer can be separated for recycle.A steam treatment vessel for deactivation of the residual catalyst canpresent in certain embodiments. A small fluid bed dryer or other dryingmeans can also be present. An example of such a process can include the“Spheripol” reactor process.

The catalyst composition in the second or third reactors may be thecompound described herein or can be any suitable catalyst compositionknown for polymerizing olefins to produce polyolefins and is desirably acomposition that can control the isotacticity of the polymers that areproduced. Non-limiting examples of suitable catalysts compositionsinclude Ziegler-Natta catalysts, metallocene catalysts, chromiumcatalysts, metal-imide/amine coordination catalysts, and combinations ofsuch catalysts each with its desirable co-catalyst and/or electron donoror other modifying agent known in the art. An example of certaindesirable catalyst compositions can be as discussed and described in WOPublication No. WO99/20663, e.g., a Ziegler-Natta catalyst compositionusing any one of a combination of aluminum alkyl donor systems. Theselection of other conditions for producing the individual impactcopolymer components and the whole propylene impact copolymer isreviewed by, for example, G. DiDrusco and R. Rinaldi in“Polypropylene-Process Selection Criteria” in HYDROCARBON PROCESSING 113(November 1984), and references cited therein.

In a preferred embodiment, a sequential polymerization process can beused and the first polymerization can be a slurry process to producehomopolymer followed by a gas-phase process for producing the impactcopolymer. The slurry process can be a loop reactor or a CSTR type ofreactor. In a loop reactor, the first reaction stage can include one ortwo tubular loop reactors where bulk polymerization of homopolymers canbe carried out in liquid propylene. The catalyst, e.g., a prepolymerizedcatalyst, and liquid propylene, and hydrogen for controlling molecularweight can be fed into the reactor. The homopolymer in liquid propyleneinside the loops can be continuously discharged to a separation unit.Unreacted propylene can be recycled to the reaction medium while thepolymer can be transferred to one or two gas phase reactors whereethylene, propylene, and hydrogen can be added to produce the impactcopolymers. The granules can be discharged to the monomer flashing andrecovery section and sent to a monomer stripping system. After thedrying unit, the granular resin can be conveyed to an extrusion systemfor stabilization, and pelletization.

Supercritical or Supersolution Polymerization DEFINITIONS

A dense fluid is a liquid or supercritical fluid having a density of atleast 300 kg/m³.

The solid-fluid phase transition temperature is defined as thetemperature below which a solid polymer phase separates from thehomogeneous polymer-containing fluid medium at a given pressure. Thesolid-fluid phase transition temperature can be determined bytemperature reduction at constant pressure starting from temperatures atwhich the polymer is fully dissolved in the fluid medium. The phasetransition is observed as the system becoming turbid, when measuredusing the method described below for determining cloud point.

The solid-fluid phase transition pressure is defined as the pressurebelow which a solid polymer phase separates from the polymer-containingfluid medium at a given temperature. The solid-fluid phase transitionpressure is determined by pressure reduction at constant temperaturestarting from pressures at which the polymer is fully dissolved in thefluid medium. The phase transition is observed as the system becomingturbid, when measured using the method described below for determiningcloud point.

The fluid-fluid phase transition pressure is defined as the pressurebelow which two fluid phases—a polymer-rich phase and a polymer-leanphase—form at a given temperature. The fluid-fluid phase transitionpressure can be determined by pressure reduction at constant temperaturestarting from pressures at which the polymer is fully dissolved in thefluid medium. The phase transition is observed as the system becomingturbid, when measured using the method described below for determiningcloud point.

The fluid-fluid phase transition temperature is defined as thetemperature below which two fluid phases—a polymer-rich phase and apolymer-lean phase—form at a given pressure. The fluid-fluid phasetransition temperature can be determined by temperature reduction atconstant pressure starting from temperatures at which the polymer isfully dissolved in the fluid medium. The phase transition is observed asthe system becoming turbid, when measured using the method describedbelow for determining cloud point.

The cloud point is the pressure below which, at a given temperature, thepolymerization system becomes turbid as described in J. VladimirOliveira, C. Dariva and J. C. Pinto, Ind. Eng, Chem. Res. 29, 2000, p.4627. For purposes of this invention and the claims thereto, the cloudpoint is measured by shining a helium laser through the selectedpolymerization system in a cloud point cell onto a photocell andrecording the pressure at the onset of rapid increase in lightscattering for a given temperature. Cloud point pressure is the point atwhich at a given temperature, the polymerization system becomes turbid.Cloud point temperature is the point at which at a given pressure, thepolymerization system becomes turbid. It should be noted that althoughboth the cloud point pressure and cloud point temperature arewell-defined physical properties, in the area of polymer engineering,“cloud point” typically refers to the cloud point pressure.

To be in the supercritical state, a substance must have a temperatureabove its critical temperature (Tc) and a pressure above its criticalpressure (Pc). The critical temperature and pressure vary withcomposition of polymerization medium. If not measured, criticaltemperatures (Tc) and critical pressures (Pc) are those found in theHandbook of Chemistry and Physics, David R. Lide, Editor-in-Chief, 82ndedition 2001-2002, CRC Press, LLC. New York, 2001. In particular, the Tcand Pc of propylene are 364.9 K and 4.6 MPa. In the event a Tc and/or Pccannot be measured for a given system, then the Tc and/or Pc will bedeemed to be the Tc and/or Pc of the mole fraction weighted averages ofthe corresponding Tc's and Pc's of the system components.

The term “continuous” means a system that operates without interruptionor cessation. For example a continuous process to produce a polymerwould be one where the reactants are continually introduced into one ormore reactors and polymer product is continually withdrawn.

A solution polymerization means a polymerization process in which thepolymer is dissolved in a liquid polymerization system, such as an inertsolvent or monomer(s) or their blends. A solution polymerization istypically a homogeneous liquid polymerization system.

A supercritical polymerization means a polymerization process in whichthe polymerization system is in a dense (i.e. its density is 300 kg/m³or higher), supercritical state.

A bulk polymerization means a polymerization process in which themonomers and/or comonomers being polymerized are used as a solvent ordiluent using little or no inert solvent as a solvent or diluent. Asmall faction of inert solvent might be used as a carrier for catalystand scavenger. A bulk polymerization system typically contains 30 volume% or less solvent, preferably less than 25 wt % of inert solvent ordiluent.

A homogeneous polymerization or a homogeneous polymerization system is apolymerization system where the polymer product is dissolved in thepolymerization medium. Such systems are not turbid as described in J.Vladimir Oliveira, C. Dariva and J. C. Pinto, Ind. Eng, Chem. Res. 29,2000, p. 4627. For purposes of this invention and the claims thereto,turbidity is measured by shining a helium laser through the selectedpolymerization system in a cloud point cell onto a photocell anddetermining the point of the onset of rapid increase in light scatteringfor a given polymerization system. Uniform dissolution in thepolymerization medium is indicated when there is little or no lightscattering (i.e. less than 5%).

A super solution polymerization or supersolution polymerization systemis one where the polymerization occurs at a temperature of 65° C. to150° C. and a pressure of between 250 to 5,000 psi (1.72 to 34.5 MPa),having: 1) 0 to 20 wt % of one or more comonomers (based upon the weightof all monomers and comonomers present in the feed) selected from thegroup consisting of ethylene and C₄ to C₁₂ olefins, 2) from 20 to 65 wt% diluent or solvent, based upon the total weight of feeds to thepolymerization reactor, 3) 0 to 5 wt % scavenger, based upon the totalweight of feeds to the polymerization reactor, 4) the olefin monomersand any comonomers are present in the polymerization system at 15 wt %or more, 5) the polymerization temperature is above the solid-fluidphase transition temperature of the polymerization system and above apressure greater than 1 MPa below the cloud point pressure of thepolymerization system, provided however that the polymerization occurs:(1) at a temperature below the critical temperature of thepolymerization system, or (2) at a pressure below the critical pressureof the polymerization system.

Supercritical or Supersolution Polymerization Process

The present polymerization process may be conducted under homogeneous(such as solution, supersolution, or supercritical) conditionspreferably including a temperature of about 60° C. to about 200° C.,preferably for 65° C. to 195° C., preferably for 90° C. to 190° C.,preferably from greater than 100° C. to about 180° C., such as 105° C.to 170° C., preferably from about 110° C. to about 160° C. and apressure in excess of 1.7 MPa, especially under supersolution conditionsincluding a pressure of between 1.7 MPa and 30 MPa, or especially undersupercritical conditions including a pressure of between 15 MPa and 1500MPa, especially when the monomer composition comprises propylene or amixture of propylene with at least one C₄ to C₂₀ α-olefin. In apreferred embodiment the monomer is propylene and the propylene ispresent at 15 wt % or more in the polymerization system, preferably at20 wt % or more, preferably at 30 wt % or more, preferably at 40 wt % ormore, preferably at 50 wt % or more, preferably at 60 wt % or more,preferably at 70 wt % or more, preferably 80 wt % or more. In analternate embodiment, the monomer and any comonomer present are presentat 15 wt % or more in the polymerization system, preferably at 20 wt %or more, preferably at 30 wt % or more, preferably at 40 wt % or more,preferably at 50 wt % or more, preferably at 60 wt % or more, preferablyat 70 wt % or more, preferably 80 wt % or more.

In a particular embodiment of the invention, the polymerization processis conducted under supersolution conditions including temperatures fromabout 65° C. to about 150° C., preferably from about 75° C. to about140° C., preferably from about 90° C. to about 140° C., more preferablyfrom about 100° C. to about 140° C., and pressures of between 1.72 MPaand 35 MPa, preferably between 5 and 30 MPa.

In another particular embodiment of the invention, the polymerizationprocess is conducted under supercritical conditions (preferablyhomogeneous supercritical conditions, e.g. above the supercritical pointand above the cloud point) including temperatures from about 90° C. toabout 200° C., and pressures of between 15 MPa and 1500 MPa, preferablybetween 20 MPa and 140 MPa.

A particular embodiment of this invention relates to a process topolymerize propylene comprising contacting, at a temperature of 60° C.or more and a pressure of between 15 MPa (150 Bar, or about 2175 psi) to1500 MPa (15,000 Bar, or about 217,557 psi), one or more olefin monomershaving three or more carbon atoms, with: 1) the catalyst system, 2)optionally one or more comonomers, 3) optionally diluent or solvent, and4) optionally scavenger, wherein: a) the olefin monomers and anycomonomers are present in the polymerization system at 40 wt % or more,b) the propylene is present at 80 wt % or more based upon the weight ofall monomers and comonomers present in the feed, c) the polymerizationoccurs at a temperature above the solid-fluid phase transitiontemperature of the polymerization system and a pressure no lower than 2MPa below the cloud point pressure of the polymerization system.

Another particular embodiment of this invention relates to a process topolymerize olefins comprising contacting propylene, at a temperature of65° C. to 150° C. and a pressure of between 250 to 5,000 psi (1.72 to34.5 MPa), with: 1) the catalyst system, 2) 0 to 20 wt % of one or morecomonomers (based upon the weight of all monomers and comonomers presentin the feed) selected from the group consisting of ethylene and C₄ toC₁₂ olefins, 3) from 20 to 65 wt % diluent or solvent, based upon thetotal weight of feeds to the polymerization reactor, and 4) 0 to 5 wt %scavenger, based upon the total weight of feeds to the polymerizationreactor, wherein: a) the olefin monomers and any comonomers are presentin the polymerization system at 15 wt % or more, b) the propylene ispresent at 80 wt % or more based upon the weight of all monomers andcomonomers present in the feed, c) the polymerization occurs at atemperature above the solid-fluid phase transition temperature of thepolymerization system and above a pressure greater than 1 MPa below thecloud point pressure of the polymerization system, provided however thatthe polymerization occurs: (1) at a temperature below the criticaltemperature of the polymerization system, or (2) at a pressure below thecritical pressure of the polymerization system.

In another embodiment, the polymerization occurs at a temperature abovethe solid-fluid phase transition temperature of the polymerizationsystem and a pressure no lower than 10 MPa below the cloud pointpressure (CPP) of the polymerization system (preferably no lower than 8MPa below the CPP, preferably no lower than 6 MPa below the CPP,preferably no lower than 4 MPa below the CPP, preferably no lower than 2MPa below the CPP). Preferably, the polymerization occurs at atemperature and pressure above the solid-fluid phase transitiontemperature and pressure of the polymerization system and, preferablyabove the fluid-fluid phase transition temperature and pressure of thepolymerization system.

In an alternate embodiment, the polymerization occurs at a temperatureabove the solid-fluid phase transition temperature of the polymerizationsystem and a pressure greater than 1 MPa below the cloud point pressure(CPP) of the polymerization system (preferably greater than 0.5 MPabelow the CPP, preferably greater than the CCP), and the polymerizationoccurs: (1) at a temperature below the critical temperature of thepolymerization system, or (2) at a pressure below the critical pressureof the polymerization system, preferably the polymerization occurs at apressure and temperature below the critical point of the polymerizationsystem, most preferably the polymerization occurs: (1) at a temperaturebelow the critical temperature of the polymerization system, and (2) ata pressure below the critical pressure of the polymerization system.

Alternately, the polymerization occurs at a temperature and pressureabove the solid-fluid phase transition temperature and pressure of thepolymerization system. Alternately, the polymerization occurs at atemperature and pressure above the fluid-fluid phase transitiontemperature and pressure of the polymerization system. Alternately, thepolymerization occurs at a temperature and pressure below thefluid-fluid phase transition temperature and pressure of thepolymerization system.

In another embodiment, the polymerization system is preferably ahomogeneous, single phase polymerization system, preferably ahomogeneous dense fluid polymerization system.

In another embodiment, the reaction temperature is preferably below thecritical temperature of the polymerization system. Preferably, thetemperature is above the solid-fluid phase transition temperature of thepolymer-containing fluid reaction medium at the reactor pressure or atleast 5° C. above the solid-fluid phase transition temperature of thepolymer-containing fluid reaction medium at the reactor pressure, or atleast 10° C. above the solid-fluid phase transformation point of thepolymer-containing fluid reaction medium at the reactor pressure. Inanother embodiment, the temperature is above the cloud point of thesingle-phase fluid reaction medium at the reactor pressure, or 2° C. ormore above the cloud point of the fluid reaction medium at the reactorpressure. In yet another embodiment, the temperature is between 60° C.and 150° C., between 60° C. and 140° C., between 70° C. and 130° C., orbetween 80° C. and 130° C. In one embodiment, the temperature is above60° C., 65° C., 70° C., 75° C., 80° C., 85° C., 90° C., 95° C., 100° C.,105° C., or 110° C. In another embodiment, the temperature is below 150°C., 140° C., 130° C., or 120° C. In another embodiment, the cloud pointtemperature is below the supercritical temperature of the polymerizationsystem or between 70° C. and 150° C.

In another embodiment, the polymerization occurs at a temperature andpressure above the solid-fluid phase transition temperature of thepolymerization system, preferably the polymerization occurs at atemperature at least 5° C. higher (preferably at least 10° C. higher,preferably at least 20° C. higher) than the solid-fluid phase transitiontemperature and at a pressure at least 2 MPa higher (preferably at least5 MPa higher, preferably at least 10 MPa higher) than the cloud pointpressure of the polymerization system. In a preferred embodiment, thepolymerization occurs at a pressure above the fluid-fluid phasetransition pressure of the polymerization system (preferably at least 2MPa higher, preferably at least 5 MPa higher, preferably at least 10 MPahigher than the fluid-fluid phase transition pressure). Alternately, thepolymerization occurs at a temperature at least 5° C. higher (preferablyat least 10° C. higher, preferably at least 20° C. higher) than thesolid-fluid phase transition temperature and at a pressure higher than,(preferably at least 2 MPa higher, preferably at least 5 MPa higher,preferably at least 10 MPa higher) than the fluid-fluid phase transitionpressure of the polymerization system.

In another embodiment, the polymerization occurs at a temperature abovethe solid-fluid phase transition temperature of the polymer-containingfluid reaction medium at the reactor pressure, preferably at least 5° C.above the solid-fluid phase transition temperature of thepolymer-containing fluid reaction medium at the reactor pressure, orpreferably at least 10° C. above the solid-fluid phase transformationpoint of the polymer-containing fluid reaction medium at the reactorpressure.

In another useful embodiment, the polymerization occurs at a temperatureabove the cloud point of the single-phase fluid reaction medium at thereactor pressure, more preferably 2° C. or more (preferably 5° C. ormore, preferably 10° C. or more, preferably 30° C. or more) above thecloud point of the fluid reaction medium at the reactor pressure.Alternately, in another useful embodiment, the polymerization occurs ata temperature above the cloud point of the polymerization system at thereactor pressure, more preferably 2° C. or more (preferably 5° C. ormore, preferably 10° C. or more, preferably 30° C. or more) above thecloud point of the polymerization system.

In another embodiment, the polymerization process temperature is abovethe solid-fluid phase transition temperature of the polymer-containingfluid polymerization system at the reactor pressure, or at least 2° C.above the solid-fluid phase transition temperature of thepolymer-containing fluid polymerization system at the reactor pressure,or at least 5° C. above the solid-fluid phase transition temperature ofthe polymer-containing fluid polymerization at the reactor pressure, orat least 10° C. above the solid-fluid phase transformation point of thepolymer-containing fluid polymerization system at the reactor pressure.In another embodiment, the polymerization process temperature should beabove the cloud point of the single-phase fluid polymerization system atthe reactor pressure, or 2° C. or more above the cloud point of thefluid polymerization system at the reactor pressure. In still anotherembodiment, the polymerization process temperature is between 50° C. and350° C., or between 60° C. and 250° C., or between 70° C. and 250° C.,or between 80° C. and 250° C. Exemplary lower polymerization temperaturelimits are 50° C., or 60° C., or 70° C., or 80° C., or 90° C., or 95°C., or 100° C., or 110° C., or 120° C. Exemplary upper polymerizationtemperature limits are 350° C., or 250° C., or 240° C., or 230° C., or220° C., or 210° C., or 200° C.

Polyolefin Products

This invention also relates to compositions of matter produced by themethods described herein.

In a preferred embodiment, the process described herein producespropylene homopolymers or propylene copolymers, such aspropylene-ethylene and/or propylene-alphaolefin (preferably C₃ to C₂₀)copolymers (such as propylene-hexene copolymers or propylene-octenecopolymers) having: a Mw/Mn of greater than 1 to 4 (preferably greaterthan 1 to 3).

Likewise, the process of this invention produces olefin polymers,preferably polyethylene and polypropylene homopolymers and copolymers.In a preferred embodiment, the polymers produced herein are homopolymersof ethylene or propylene, are copolymers of ethylene preferably havingfrom 0 to 25 mole % (alternately from 0.5 to 20 mole %, alternately from1 to 15 mole %, preferably from 3 to 10 mole %) of one or more C₃ to C₂₀olefin comonomer (preferably C₃ to C₁₂ alpha-olefin, preferablypropylene, butene, hexene, octene, decene, dodecene, preferablypropylene, butene, hexene, octene), or are copolymers of propylenepreferably having from 0 to 25 mole % (alternately from 0.5 to 20 mole%, alternately from 1 to 15 mole %, preferably from 3 to 10 mole %) ofone or more of C₂ or C₄ to C₂₀ olefin comonomer (preferably ethylene orC₄ to C₁₂ alpha-olefin, preferably ethylene, butene, hexene, octene,decene, dodecene, preferably ethylene, butene, hexene, octene).

In a preferred embodiment, the monomer is ethylene and the comonomer ishexene, preferably from 1 to 15 mole % hexene, alternately 1 to 10 mole%.

Typically, the polymers produced herein have an Mw (as measured byGPC-DRI) from 5,000 to 1,000,000 g/mol, alternately 20,000 to 1,000,000g/mol, alternately 100,000 to 800,000 g/mol, alternately 200,000 to600,000 g/mol, alternately from 300,000 to 550,000 g/mol, alternatelyfrom 330 g/mol to 500,000 g/mol.

Typically, the polymers produced herein have an Mw/Mn (as measured byGPC-DRI) of greater than 1 to 20, preferably 1.1 to 15, preferably 1.2to 10, preferably 1.3 to 5, preferably 1.4 to 4. Alternately, the Mw/Mnis from 5 to 15.

Typically, the polymers produced herein have an Mw (as measured byGPC-DRI) of 5,000 to 1,000,000 g/mol (preferably 25,000 to 750,000g/mol, preferably 50,000 to 500,000 g/mol), and/or an Mw/Mn of greaterthan 1 to 40 (alternately 1.1 to 20, alternately 1.2 to 10, alternately1.3 to 5, 1.4 to 4, alternately 1.4 to 3).

In a preferred embodiment the polymer produced herein has a unimodal ormultimodal molecular weight distribution as determined by Gel PermeationChromatography (GPC). By “unimodal” is meant that the GPC trace has onepeak or inflection point. By “multimodal” is meant that the GPC tracehas at least two peaks or inflection points. An inflection point is thatpoint where the second derivative of the curve changes in sign (e.g.,from negative to positive or vice versus).

The polymer produced herein can have a melting point (Tm, DSC peaksecond melt) of at least 145° C., or at least 150° C., or at least 152°C., or at least 153° C., or at least 154° C. For example, the polymercan have a melting point from at least 145° C. to about 175° C., about150° C. to about 165° C., about 152° C. to about 160° C.

The polymer produced herein can have a 1% secant flexural modulus from alow of about 1100 MPa, about 1200 MPa, about 1250 MPa, about 1300 MPa,about 1400 MPa, or about 1,500 MPa to a high of about 1,800 MPa, about2,100 MPa, about 2,200 MPa, as measured according to ASTM D 790 (A, 1.0mm/min). For example, the polymer can have a flexural modulus from about1100 MPa to about 2,200 MPa, about 1200 MPa to about 2,000 MPa, about1400 MPa to about 2,000 MPa, or polymer can have a flexural modulus of1500 MPa or more, as measured according to ASTM D 790 (A, 1.0 mm/min)

The polymer produced herein can have a melt flow rate (MFR) from a lowof about 0.01 dg/min, about 0.1 dg/min, about 0.2 dg/min, about 0.5dg/min, about 1 dg/min, about 15 dg/min, about 30 dg/min, or about 45dg/min to a high of about 75 dg/min, about 100 dg/min, about 200 dg/min,or about 300 dg/min. For example, the impact copolymer can have an MFRof about 0.01 dg/min to about 300 dg/min, about 0.5 dg/min to about 300dg/min, about 1 dg/min to about 300 dg/min, about 5 dg/min to about 150dg/min, or about 10 dg/min to about 100 dg/min, or about 20 dg/min toabout 60 dg/min.

Impact Copolymer

The polymers produced herein can be used in impact copolymers. Theimpact copolymer (ICP) can include the polypropylene polymer producedherein and another polymer such as an ethylene copolymer. The morphologyis typically such that the matrix phase is primarily the polypropylenepolymer and the dispersed phase can be primarily the ethylene copolymerphase.

The impact copolymer can have a total propylene content of at least 75wt %, at least 80 wt %, at least 85 wt %, at least 90 wt %, or at least95 wt %, based on the weight of the impact copolymer.

The impact copolymer can have a total comonomer content from about 1 wt% to about 35 wt %, about 2 wt % to about 30 wt %, about 3 wt % to about25 wt %, or about 5 wt % to about 20 wt %, based on the total weight ofthe impact copolymer, with the balance being propylene.

Preferred impact copolymers comprise isotactic polypropylene andethylene copolymer and typically have an ethylene copolymer (preferablyethylene propylene copolymer) content from a low of about 5 wt %, about8 wt %, about 10 wt %, or about 15 wt % to a high of about 25 wt %,about 30 wt %, about 38 wt %, or about 42 wt %. For example, the impactpolymer can have an ethylene copolymer content of about 5 wt % to about40 wt %, about 6 wt % to about 35 wt %, about 7 wt % to about 30 wt %,or about 8 wt % to about 30 wt %.

In preferred impact copolymers comprising isotactic polypropylene andethylene copolymer, the impact copolymer can have a propylene content ofthe ethylene copolymer component from a low of about 25 wt %, about 37wt %, or about 46 wt % to a high of about 73 wt %, about 77 wt %, orabout 80 wt %, based on the based on a weight of the ethylene copolymer.For example, the impact copolymer can have a propylene content of theethylene copolymer component from about 25 wt % to about 80 wt %, about10 wt % to about 75 wt %, about 35 wt % to about 70 wt %, or at least 40wt % to about 80 wt %, based on the weight of the ethylene copolymer.

In preferred impact copolymers comprising isotactic polypropylene andethylene copolymer, the impact copolymer can have ratio of the intrinsicviscosity (IV, ASTM D 1601 −135° C. in decalin) of the ethylenecopolymer component to the intrinsic viscosity of the polypropylenecomponent from a low of about 0.5, about 1.5, about 3, or about 4 to ahigh of about 6, about 9, about 12, or about 15. For example, the impactcopolymer component can have a ratio of the intrinsic viscosity of about0.5 to about 15, about 0.75 to about 12, or about 1 to about 7.

The impact copolymer can have a propylene meso diads content in thepolypropylene component 90% or more, 92% or more, about 94% or more, orabout 96% or more. Polypropylene microstructure is determined accordingto the ¹³C NMR procedure described in US 2008/0045638 at paragraph[0613].

The impact copolymer can have a weight average molecular weight (Mw)from a low of about 20 kg/mol, about 50 kg/mol, about 75 kg/mol, about150 kg/mol, or about 300 kg/mol to a high of about 600 kg/mol, about 900kg/mol, about 1,300 kg/mol, or about 2,000 kg/mol. For example, theethylene copolymer can have a Mw of about 50 kg/mol to about 3,000kg/mol, about 100 kg/mol to about 2,000 kg/mol, or about 200 kg/mol toabout 1,000 kg/mol.

The impact copolymer can have a melt flow rate (MFR) from about 1 dg/minto about 300 dg/min, about 5 dg/min to about 150 dg/min, or about 10dg/min to about 100 dg/min, or about 20 dg/min to about 60 dg/min.

The impact copolymer can have a melting point (Tm, peak second melt)from at least 100° C. to about 175° C., about 105° C. to about 170° C.,about 110° C. to about 165° C., or about 115° C. to about 155° C.

The impact copolymer can have a heat of fusion (H_(f), DSC second heat)of 60 J/g or more, 70 J/g or more, 80 J/g or more, 90 J/g or more, about95 J/g or more, or about 100 J/g or more.

The impact copolymer can have a 1% secant flexural modulus from about300 MPa to about 3,000 MPa, about 500 MPa to about 2,500 MPa, about 700MPa to about 2,000 MPa, or about 900 MPa to about 1,500 MPa, as measuredaccording to ASTM D 790 (A, 1.3 mm/min).

The impact copolymer can have a notched Izod impact strength at 23° C.of about 2.5 KJ/m² or more, about 5 KJ/m² or more, about 7.5 KJ/m² ormore, about 10 KJ/m² or more, about 15 KJ/m² or more, about 20 KJ/m² ormore, about 25 KJ/m² or more, or about 50 KJ/m² or more, as measuredaccording to ASTM D 256 (Method A), optionally to a high of about 30KJ/m², about 35 KJ/m², about 45 KJ/m², about 55 KJ/m², or about 65KJ/m².

The impact copolymer can have a Gardner impact strength at −30° C. fromabout 2 KJ/m² to about 100 KJ/m², about 3 KJ/m² to about 80 KJ/m², orabout 4 KJ/m² to about 60 KJ/m², as measured according to ASTM D 5420(GC).

The impact copolymer can have a heat deflection temperature (HDT) ofabout 80° C. or more, about 85° C. or more, about 90° C. or more, orabout 95° C. or more, as measured according to ASTM D 648 (0.45 MPa).

Blends

In another embodiment, the polymer (preferably polypropylene) producedherein is combined with one or more additional polymers prior to beingformed into a film, molded part or other article. Other useful polymersinclude polyethylene, isotactic polypropylene, highly isotacticpolypropylene, syndiotactic polypropylene, random copolymer of propyleneand ethylene, and/or butene, and/or hexene, polybutene, ethylene vinylacetate, LDPE, LLDPE, HDPE, ethylene vinyl acetate, ethylene methylacrylate, copolymers of acrylic acid, polymethylmethacrylate or anyother polymers polymerizable by a high-pressure free radical process,polyvinylchloride, polybutene-1, isotactic polybutene, ABS resins,ethylene-propylene rubber (EPR), vulcanized EPR, EPDM, block copolymer,styrenic block copolymers, polyamides, polycarbonates, PET resins, crosslinked polyethylene, copolymers of ethylene and vinyl alcohol (EVOH),polymers of aromatic monomers such as polystyrene, poly-1 esters,polyacetal, polyvinylidine fluoride, polyethylene glycols, and/orpolyisobutylene.

In a preferred embodiment, the polymer (preferably the polyethylene orpolypropylene) is present in the above blends, at from 10 to 99 wt %,based upon the weight of the polymers in the blend, preferably 20 to 95wt %, even more preferably at least 30 to 90 wt %, even more preferablyat least 40 to 90 wt %, even more preferably at least 50 to 90 wt %,even more preferably at least 60 to 90 wt %, even more preferably atleast 70 to 90 wt %.

The blends described above may be produced by mixing the polymers of theinvention with one or more polymers (as described above), by connectingreactors together in series to make reactor blends or by using more thanone catalyst in the same reactor to produce multiple species of polymer.The polymers can be mixed together prior to being put into the extruderor may be mixed in an extruder.

The blends may be formed using conventional equipment and methods, suchas by dry blending the individual components and subsequently meltmixing in a mixer, or by mixing the components together directly in amixer, such as, for example, a Banbury mixer, a Haake mixer, a Brabenderinternal mixer, or a single or twin-screw extruder, which may include acompounding extruder and a side-arm extruder used directly downstream ofa polymerization process, which may include blending powders or pelletsof the resins at the hopper of the film extruder. Additionally,additives may be included in the blend, in one or more components of theblend, and/or in a product formed from the blend, such as a film, asdesired. Such additives are well known in the art, and can include, forexample: fillers; antioxidants (e.g., hindered phenolics such asIRGANOX™ 1010 or IRGANOX™ 1076 available from Ciba-Geigy); phosphites(e.g., IRGAFOS™ 168 available from Ciba-Geigy); anti-cling additives;tackifiers, such as polybutenes, terpene resins, aliphatic and aromatichydrocarbon resins, alkali metal and glycerol stearates, andhydrogenated rosins; UV stabilizers; heat stabilizers; anti-blockingagents; release agents; anti-static agents; pigments; colorants; dyes;waxes; silica; fillers; talc; and the like.

Films

Specifically, any of the foregoing polymers, such as the foregoingpolypropylenes or blends thereof, may be used in a variety of end-useapplications. Such applications include, for example, mono- ormulti-layer blown, extruded, and/or shrink films. These films may beformed by any number of well-known extrusion or coextrusion techniques,such as a blown bubble film processing technique, wherein thecomposition can be extruded in a molten state through an annular die andthen expanded to form a uni-axial or biaxial orientation melt prior tobeing cooled to form a tubular, blown film, which can then be axiallyslit and unfolded to form a flat film. Films may be subsequentlyunoriented, uniaxially oriented, or biaxially oriented to the same ordifferent extents. One or more of the layers of the film may be orientedin the transverse and/or longitudinal directions to the same ordifferent extents. The uniaxially orientation can be accomplished usingtypical cold drawing or hot drawing methods. Biaxial orientation can beaccomplished using tenter frame equipment or a double bubble processesand may occur before or after the individual layers are broughttogether. For example, a polyethylene layer can be extrusion coated orlaminated onto an oriented polypropylene layer or the polyethylene andpolypropylene can be coextruded together into a film then oriented.Likewise, oriented polypropylene could be laminated to orientedpolyethylene or oriented polyethylene could be coated onto polypropylenethen optionally the combination could be oriented even further.Typically the films are oriented in the Machine Direction (MD) at aratio of up to 15, preferably between 5 and 7, and in the TransverseDirection (TD) at a ratio of up to 15, preferably 7 to 9. However, inanother embodiment the film is oriented to the same extent in both theMD and TD directions.

The films may vary in thickness depending on the intended application;however, films of a thickness from 1 to 50 μm are usually suitable.Films intended for packaging are usually from 10 to 50 μm thick. Thethickness of the sealing layer is typically 0.2 to 50 μm. There may be asealing layer on both the inner and outer surfaces of the film or thesealing layer may be present on only the inner or the outer surface.

In another embodiment, one or more layers may be modified by coronatreatment, electron beam irradiation, gamma irradiation, flametreatment, or microwave. In a preferred embodiment, one or both of thesurface layers is modified by corona treatment.

In another embodiment, this invention relates to:

1. A metallocene catalyst compound represented by the formula:

wherein,

each of the indenyl rings are substituted with identical substituents atidentical positions;

R⁴ and R¹⁰ are phenyl groups substituted at the 3′ and 5′ positions;

R² and R⁸ are cyclic groups;

M is a group transition 2, 3 or 4 metal;

T is a bridging group;

each X is an anionic leaving group; and

each R¹, R³, R⁵, R⁶, R⁷, R⁹, R¹¹, R¹², R¹³, and R¹⁴ is, independently,hydrogen, or a hydrocarbyl, substituted hydrocarbyl, halocarbyl,substituted halocarbyl, silylcarbyl, substituted silylcarbyl,germylcarbyl, or substituted germylcarbyl substituents.

2. The metallocene catalyst of paragraph 1, wherein R² and R⁸ arecyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, orcyclooctyl groups.3. The metallocene catalyst of either of paragraphs 1 or 2, wherein R⁴and R¹⁰ are substituted at 3′ and 5′ positions of the phenyl rings witha C₁ to a C₁₀ alkyl group.4. The metallocene catalyst of paragraph 3, wherein the C₁ to C₁₀ alkylgroup is t-butyl, sec-butyl, n-butyl, i-propyl, n-propyl, cyclopropyl,cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, phenyl,mesityl, or adamantyl.5. The metallocene catalyst of any of paragraphs 1 through 4, wherein Mis Hf, Ti and/or Zr, preferably Zr or Hf.6. The metallocene catalyst of any of paragraphs 1 through 5, whereineach X is, independently, selected from the group consisting ofhydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides,alkoxides, sulfides, phosphides, halides, dienes, amines, phosphines,ethers, and a combination thereof, (two X's may form a part of a fusedring or a ring system).7. The metallocene catalyst of any of paragraphs 1 through 6, wherein Tis represented by the formula R₂ ^(a)J, where J is C, Si, or Ge, andeach R^(a) is, independently, hydrogen, halogen, C₁ to C₂₀ hydrocarbylor a C₁ to C₂₀ substituted hydrocarbyl, and two R^(a) can form a cyclicstructure including aromatic, partially saturated, or saturated cyclicor fused ring system.8. The metallocene catalyst of any of paragraphs 1 through 6, wherein Tis CH₂, CH₂CH₂, C(CH₃)₂, SiMe₂, SiPh₂, SiMePh, Si(CH₂)₃, Si(CH₂)₄,Si(Me₃SiPh)₂, or Si(CH₂)₅.9. The metallocene catalyst of any of paragraphs 1 through 8, whereinthe catalyst formula is one or more of:dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-butylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-butylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-phenylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-phenylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-isopropylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-isopropylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-methylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-methylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-hexylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-hexylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-n-butylphenyl)indenyl)HfCl₂,and/ordimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-nt-butylphenyl)indenyl)ZrCl₂.10. The metallocene catalyst of any of paragraphs 1 through 9, whereinthe rac/meso ratio is 5:1 or greater.11. The metallocene catalyst of any of paragraphs 1 through 9, whereinthe rac/meso ratio is 7:1 or greater.12. The metallocene catalyst of any of paragraphs 1 through 9, whereinthe rac/meso ratio is 20:1 or greater.13. A catalyst system comprising activator and the metallocene compoundof any of paragraphs 1 through 12.14. The catalyst system of paragraph 13, wherein the activator comprisesalumoxane.15. The catalyst system of paragraph 13, wherein alumoxane is present ata molar ratio of aluminum to catalyst compound transition metal of 100:1or more.16. The catalyst system of paragraph 13, 14 or 15, wherein the activatorcomprises a non-coordinating anion activator.17. The catalyst system of paragraph 13, wherein activator isrepresented by the formula:

(Z)_(d) ⁺(A^(d−))

wherein Z is (L-H) or a reducible Lewis Acid, L is an neutral Lewisbase; H is hydrogen; (L-H)⁺ is a Bronsted acid; A^(d−) is anon-coordinating anion having the charge d−; and d is an integer from 1to 3.18. The catalyst system of paragraph 13, wherein activator isrepresented by the formula:

(Z)_(d) ⁺(A^(d−))

wherein A^(d−) is a non-coordinating anion having the charge d−; d is aninteger from 1 to 3, and Z is a reducible Lewis acid represented by theformula: (Ar₃C⁺), where Ar is aryl or aryl substituted with aheteroatom, a C₁ to C₄₀ hydrocarbyl, or a substituted C₁ to C₄₀hydrocarbyl.19. The catalyst system of paragraph 13, wherein the activator is one ormore of: N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate,triphenylcarbenium tetrakis(pentafluorophenyl)borate, trimethylammoniumtetrakis(perfluoronaphthyl)borate, or N,N-dimethylaniliniumtetrakis(pentafluoronaphthyl)borate.20. The catalyst system of any of paragraphs 13 to 19, wherein thecatalyst system is supported.21. The catalyst system of any of paragraphs 13 to 19, wherein thecatalyst system is supported on silica.22. A process to polymerize olefins comprising contacting one or moreolefins with a catalyst system comprising an activator and a catalystcompound of any of paragraphs 1 to 12 or a catalyst system as describedin any of paragraphs 13-21.23. The process of paragraph 22, wherein the metallocene catalyst orcatalyst system is in solution phase producing a polymer having an Mw/Mnof from about 1.7 to about 2.5.24. The process of paragraph 22, wherein the metallocene catalyst orcatalyst system is on a support to produce a polymer having an Mw/Mn offrom about 2.5 to about 15.25. The process of paragraph 22, wherein the process occurs at atemperature of from about 0° C. to about 300° C., at a pressure in therange of from about 0.35 MPa to about 10 MPa, and at a time up to 300minutes.26. The process of paragraph 25 further comprising obtaining polymer.27. The process of any of paragraphs 22 through 26, wherein the polymerobtained has an MFR of 10 dg/min or more and a 1% Secant flexuralmodulus of than 1500 MPa or more.28. The process of any of paragraphs 22 to 27 wherein no hydrogen isadded to the polymerization.29. The process of any of paragraphs 22 through 28, wherein the polymerobtained has a melting point of 152° C. or more.30. The process of any of paragraphs 22 through 29, wherein the polymerobtained has an MFR of 10 dg/min or more and a 1% Secant flexuralmodulus of than 1500 MPa or more.31. The process of any of paragraphs 22 through 23, wherein the polymerobtained has Tm of 155° C. or more and an Mw of 330,000 g/mol or more.

EXPERIMENTAL

MAO is methyl alumoxane (30 wt % in toluene) obtained from Albemarle.

Examples Indene Synthesis

4-(3,5-Di-tert-butylphenyl)-1H-indene (2)

Mixture of compound 1 (60 g, 308 mmol, 1 equiv),2-(3,5-di-tert-butylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (126g, 400 mmol, 1.3 equiv), powdered potassium carbonate (128 g, 924 mmol,3 equiv) and bis(triphenylphosphine)palladium(II)dichloride (25.3 g, 31mmol, 0.1 equiv), 1,4-dioxane (300 mL) and water (150 mL) was heatedovernight at 80° C. The reaction was poured into 700 mL of water andextracted with ethyl acetate (3×500 mL). The combined organic layerswere washed with saturated brine (1 L), dried over sodium sulfate, andconcentrated under reduced pressure. The resulting residue was purifiedover silica gel (1 Kg) eluting with heptanes to give compound 2 (59 g,63% yield) as a light yellow oil.

2-Bromo-4-(3,5-di-tert-butylphenyl)-1H-indene (3)

A cold solution (5° C.) of compound 2 (49 g, 161 mmol, 1 equiv),dimethyl sulfoxide (500 mL) and water (5 mL) was treated in one portionwith N-bromosuccinimide (43 g, 241 mmol, 1.5 equiv). The bath wasremoved and the reaction allowed to stir at room temperature overnight.The reaction was poured into water (1 L) and the mixture extracted withethyl acetate (2×500 mL). The combined organic layers were washed withsaturated brine (1 L), dried over sodium sulfate and concentrated underreduced pressure. The resulting residue was dissolved in toluene (500mL) and p-toluenesulfonic acid (6.2 g, 32.6 mmol, 0.2 equiv) was added.The mixture was refluxed for 20 hours while removing water with aDean-Stark trap. The reaction was cooled to room temperature andconcentrated under reduced pressure. The resulting residue was purifiedover silica gel (1 Kg) eluting with heptanes to give compound 3 (41 g,66% yield) as a white solid.

2-Cyclopropyl-4-(3,5-di-tert-butylphenyl)-1H-indene (4)

A solution of compound 3 (16.1 g, 42.0 mmol, 1 equiv) and anhydroustoluene (200 mL) was treated with[1,1′-bis(diphenylphosphino)ferrocene]dichlopalladium(II) DCM adduct(3.43 g, 4.2 mmol, 0.1 equiv). After stirring for 10 minutes, 0.5 Mcyclopropylmagnesium bromide in tetrahydrofuran (420 mL, 210 mmol, 5equiv) was added dropwise. The reaction was heated at 60° C. overnight.The reaction was cooled with an ice bath, acidified with 1N HCl to pH 3and extracted with ethyl acetate (3×500 mL). The combined organic layerswere washed with saturated brine (800 mL), dried over sodium sulfate,and concentrated under reduced pressure. The residue was purified on anAnaLogix (65-200 g) column with dry-loading, eluting with heptanes togive compound 4 (7.0 g, 48% yield) as a white solid.

Small-Scale Synthesis: Lithium{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]}

A solution of 2-cyclopropyl-7-(3,5-di-tert-butylphenyl)-indene (2.06 g,5.98 mmol) in diethyl ether (30 mL) was precooled at −35° C. for 30 min.nBuLi (2.5 M, 2.4 mL, 6 mmol) was added. The orange solution was stirredat room temperature for 5 h. All volatiles were evaporated. The residuewas washed with hexane (10 mL×3) and dried under vacuum to give thecrude product as an off-white solid (2 g).

Chloro(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilane

A solution of lithium{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]} (0.9 g, 2.568mmol) in diethyl ether (20 mL) was precooled at −35° C. for 20 min.Me₂SiCl₂ (4.5 mL, 37.1 mmol) was added and the white slurry was stirredat room temperature for 22 h. All volatiles were evaporated. The residuewas extracted with hexane (25 mL). The hexane filtrate was evaporated todryness under vacuum to givechloro(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilaneas a white sticky solid (0.98 g).

(2-Cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilyltrifluoromethanesulfonate

A solution of silver trifluoromethanesulfonate (0.585 g, 2.277 mmol) intoluene (10 mL) was added to a solution ofchloro(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilane(0.96 g, 2.196 mmol) in toluene (10 mL). The slurry was stirred at roomtemperature for 3 h. Toluene was removed under vacuum and the residuewas extracted with hexane (20 mL). The hexane filtrate was concentratedunder vacuum to give(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilyltrifluoromethanesulfonate as a white sticky solid (0.925 g).

Bis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilane

A precooled solution of lithium{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]} (0.58 g, 1.655mmol) in diethyl ether (10 mL) was added to a precooled solution (−35°C. for min) of(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilyltrifluoromethanesulfonate (0.9 g, 1.634 mmol) in diethyl ether (10 mL).The pale yellow solution was stirred at room temperature overnight. Allvolatiles were removed under vacuum. The residue was extracted withhexane (25 mL). The hexane filtrate was evaporated to dryness to givethe product as a white solid (1.11 g).

Dilithium dimethylsilyl bis{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]}

Then the above crude product (1.07 g, 1.436 mmol) was dissolved indiethyl ether (20 mL) and precooled at −35° C. for 15 min. ^(n)BuLi (2.5M, 1.2 mL, 3 mmol) was added. The solution was stirred at roomtemperature for 7 h. All volatiles were removed under vacuum. Theresidue was washed with hexane (10 mL×2) and dried under vacuum to givethe dilithium compound as an Et₂O (0.68 eq) adduct (1.05 g).

Dimethylsilyl bis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)zirconium dichloride

A precooled solution (−35° C. for 20 min) of {dilithium dimethylsilylbis{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]}}[Et₂O]_(0.68)(0.4 g, 0.495 mmol) in Et₂O (5 mL) was added to precooled slurry (−35°C. for 15 min) of ZrCl₄ (0.116 g, 0.498 mmol) in Et₂O (15 mL). Theorange slurry was stirred at room temperature for 24 h. The solution wasevaporated to dryness. The residue was extracted with toluene (15 mL).The toluene filtrate was concentrated to dryness under vacuum to givethe crude metallocene product as an orange solid (0.46 g, 1:1 rac/mesomixture). Fractional crystallization separation affords 0.11 g (25%) ofthe metallocene with a rac/meso-ratio of 7.1:1 A small fraction (about15 mol %) of unknown compound was also obtained in this fraction. (Thisis MTC-1). Another fraction yields 0.145 g (32%) of the metallocene witha meso/rac-ratio of 5:1 (This is MTC-2).

Medium-Scale Synthesis: Lithium{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]}

A solution of 2-cyclopropyl-7-(3,5-di-tert-butylphenyl)-indene (5.93 g,17.21 mmol) in diethyl ether (40 mL) was precooled at −35° C. for 30min. nBuLi (2.5 M, 7 mL, 17.5 mmol) was added. The solution was stirredat room temperature for 16 h. All volatiles were evaporated. The residuewas washed with pentane (10 mL×4, 40 mL×1) and dried under vacuum togive the crude product (4.68 g).

Chloro(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilane

A solution of lithium{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]} (2.38 g, 6.791mmol) in diethyl ether (30 mL) was precooled at −35° C. for 10 min.Me₂SiCl₂ (12.9 g, 99.95 mmol) was added and the white slurry was stirredat room temperature for 28 h. All volatiles were evaporated. The residuewas extracted with pentane (40 mL). The pentane filtrate was evaporatedto dryness under vacuum to givechloro(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilaneas a white sticky solid (1.68 g).

(2-Cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilyltrifluoromethanesulfonate

A solution ofchloro(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilane(1.64 g, 3.752 mmol) in toluene (10 mL) was added to stirring mixture ofsilver trifluoromethanesulfonate (1 g, 3.892 mmol) in toluene (10 mL).The slurry was stirred at room temperature for 3 h. Toluene was removedunder vacuum and the residue was extracted with pentane (40 mL). Thepentane filtrate was concentrated under vacuum to give crude(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilyltrifluoro-methane-sulfonate (1.93 g).

Bis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilane

A precooled solution of lithium{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]} (1.26 g, 3.595mmol) in diethyl ether (20 mL) was added to a precooled solution (−35°C. for min) of(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)dimethylsilyltrifluoromethanesulfonate (1.93 g, 3.504 mmol) in diethyl ether (10 mL).The mixture was stirred at room temperature for 23 hr. All volatileswere removed under vacuum. The residue was extracted with pentane (40mL). The pentane filtrate was evaporated to dryness to give the crudeproduct (2.6 g).

Dilithium dimethylsilylbis{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenide]}

Then the above crude product (2.54 g, 3.408 mmol) was dissolved indiethyl ether (25 mL) and precooled at −20° C. for 1 h. nBuLi (2.5 M,2.8 mL, 7 mmol) was added. The solution was stirred at room temperaturefor 22 h. All volatiles were removed under vacuum. The residue waswashed with pentane (5 mL×3) and dried under vacuum to give thedilithium compound as an Et₂O (0.88 eq) adduct (2.66 g).

Dimethylsilyl bis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)zirconium dichloride

A precooled solution of {dilithium dimethylsilylbis{1-[2-cyclopropyl-4-(3,5-di-tert-butylphenyl)indenide]}}[Et₂O]_(0.88)(2.64 g, 3.211 mmol) in Et₂O (15 mL) was added to precooled of ZrCl₄(0.75 g, 3.218 mmol) in Et₂O (20 mL). The slurry was stirred at roomtemperature for 20 h. The mixture was evaporated to dryness. The residuewas extracted with pentane (15 mL once, 5 mL once) (Fraction 1). Theresidue was then extracted with toluene (15 mL) (Fraction 2).

Fraction 1: The pentane filtrate was concentrated to dryness undervacuum to give the crude metallocene. Crystallization of the crudeproduct in pentane (20 mL) at −15° C. affords the metallocene with arac/meso-ratio of 7:1 (0.79 g, 27%). Further fractional crystallizationseparation yields rac-dimethylsilylbis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl) zirconiumdichloride as a yellow solid (0.15 g, 5.2%) having a rac/meso ratio ofgreater than 20:1. (MTC-3; this fraction was used for synthesis ofsupported catalyst below.)

Fraction 2: Toluene filtrate was concentrated to dryness to give 0.74 g(25%) of metallocenes with a rac/meso ratio of 1:28. Further washing 0.5g of this material with pentane affords 0.4 g of metallocene with arac/meso ratio of 1:56.

¹H NMR (400 MHz, C₆D₆, 23° C.): rac: δ 7.95 (m, 4H), 7.62 (m, 2H), 7.49(m, 4H), 6.98 (s, 2H), 6.90 (m, 2H), 1.84 (m, 2H), 1.42 (s, 36H), 0.99(s, 6H, SiMe₂), 0.86 (m, 2H), 0.66 (m, 2H), 0.50 (m, 2H), 0.13 (m, 2H).meso: 7.92 (m, 4H), 7.61 (m, 2H), 7.59-7.27 (m, 4H), 6.86-6.82 (m, 4H),1.91 (m, 2H), 1.44 (s, 36H), 1.27 (m, 2H), 1.09 (s, 3H, SiMe), 0.91 (s,3H, SiMe), 0.68 (m, 2H), 0.61 (m, 2H), 0.13 (m, 2H).

Large-Scale Synthesis: 4-(3,5-di-tert-butylphenyl)-2-cyclopropyl indene

A solution of 2-bromo-4-(3,5-di-tert-butylphenyl)-1H-indene (102.5 g,267.6 mmol) and[1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene]triphenylphosphinenickel(II) dichloride (2.726 g, 3.89 mmol) was treated withcyclopropylmagnesium bromide solution (0.5 M in THF, 600 mL, 300.0mmol). The mixture was stirred at room temperature for 10 minutes and60° C. for 3 hours. Then the reaction was quenched with saturated NH₄Cland extracted with Et₂O (250 mL×2), the combined organic phases werewashed with water (300 mL) and brine (200 mL) then concentrated underreduced pressure. The resulting residue was subjected to flashchromatography (Al₂O₃, eluent: hexane/Et₂O=10:1) to yield an off-whitesolid as product (82.0 g 93%).

Lithium {1-[4-(3,5-di-tert-butylphenyl)-2-cyclopropyl indenide]}

A solution of 7-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indene (43.0 g,125.0 mmol) in diethyl ether (500 mL) was precooled at −35° C. for 0.5h. nBuLi (2.5 M, 53.0 mL, 131.2 mmol) was added. The solution wasstirred at room temperature for 2 h. All volatiles were evaporated. Theresidue was washed with pentane (100 mL) and dried under vacuum to givethe crude product (44.2 g).

Chlorodimethyl[4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indenyl]silane

A solution of the above crude product (44.2 g, 125.0 mmol) in diethylether (700 mL) was precooled at −35° C. for 30 min. Me₂SiCl₂ (112.0 g,875 mmol) was added and the white slurry was stirred at room temperaturefor 2 h. All volatiles were evaporated. The residue was extracted withpentane (500 mL) and the filtrate was concentrated to dryness undervacuum to give the product (55.1 g).

Dimethylsilyl[4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indenyl]trifluoromethane-sulfonate

A solution ofchlorodimethyl[4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indenyl]silane(55.1 g, 125.0 mmol) in toluene (500 mL) was treated with silvertrifluoromethanesulfonate (33.6 g, 131.0 mmol) with stirring. The whiteslurry was stirred at room temperature for 2 h. Toluene was removedunder vacuum and the residue was extracted with hexane (500 mL). Thefiltrate was concentrated under vacuum to give the product (63.1 g).

Bis(4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indenyl)dimethylsilane

A precooled solution ofdimethylsilyl[4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-1H-inden-1-yl]trifluoromethanesulfonate(60.0 g, 10.2 mmol) in diethyl ether (400 mL) was added to a precooledmixture of lithium {1-[4-(3,5-di-tert-butylphenyl)-2-cyclopropylindenide]} (35.5 g, 10.2 mmol) in diethyl ether (400 mL). The solutionwas stirred at room temperature overnight. Diethyl ether was evaporated.The residue was subjected to flash chromatography (silica gel, eluent:hexane/Et₂O=100:5) to give the crude product as a colorless foam (55.0g).

Dilithium dimethylsilyl bis-(4-(3,5-di-tert-butylphenyl)-2-cyclopropylindenide)

^(n)BuLi (2.5 M, 61.3 mL, 153.3 mmol) was added to a precooled solutionof the above product (54.5 g, 74.0 mmol) in diethyl ether (35 mL) andtoluene (350 mL). The solution was stirred at room temperature for 3 h.All volatiles were removed under vacuum. The residue was washed withpentane (100 mL) and dried under vacuum to give the dilithium compound(56.1 g).

Dimethylsilylbis(4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indenyl)zirconiumdichloride

A precooled solution of the above dilithium dimethylsilylbis-(4-(3,5-di-tert-butylphenyl)-2-cyclopropyl indenide) (56.1 g, 74.0mmol) in toluene (500 mL) was treated with ZrCl₄ (17.02 g, 74.0 mmol).The mixture was stirred at room temperature overnight. The solution wasevaporated to dryness. The residue was extracted with pentane (500 mL)and then extracted with dichloromethane (300 mL). The filtrates wereevaporated to dryness to get the crude metallocene (50 g,rac/meso=1:0.89). The mixture was recrystallized from hot hexane/tolueneto afford 15.21 g (33%) of the corresponding meso-metallocene(meso/rac>50:1). The combined filtrates were concentrated to dryness.The residue was recrystallized from hot pentane/dichloromethane to yield13.933 g (20%) of bis(4-(3,5-di-tert-butylphenyl)-2-cyclopropyl-indenyl)zirconium dichloride with a rac/meso ratio>100:1.

Supported rac-Dimethylsilylbis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl)zirconiumdichloride (Catalyst D)

In a 20 mL vial rac-dimethylsilylbis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl) zirconiumdichloride (25.2 mg, 0.0278 mmol) [MTC-3] was stirred alongside MAO (30%by weight in toluene, 0.2345 g of solution) along with another 2 mL oftoluene for 1 h. In a small celstir 130° C. calcined silica pretreatedwith MAO (130° C. SMAO) (0.6954 g) was slurried in 20 mL of toluene. Thecelstir was chilled for 1 min in the freezer (−35° C.) before thecatalyst solution was added to the slurry. The slurry was stirred for 1h while spending 1 min of every 10 min in the freezer. The slurry wasthen heated to 40° C. and stirred for 2 h. The slurry was filtered usinga fine glass frit, and then reslurried in 20 mL of toluene and stirredfor an additional 30 min at 60° C. The slurry was filtered again, andthen reslurried in 20 mL of toluene and stirred for an additional 30 minat 60° C. The slurry was filtered, and then reslurried in 20 mL oftoluene and stirred for an additional 30 min at 60° C. and then filteredfor the final time. The celstir was washed out with 20 mL of toluene andthe solid was dried under vacuum. Collected 0.619 g of pink solid. TheSMAO is typically prepared as follows: 130° C. Calcined Davison 948Silica (20.8606 g, calcined at 130° C.) was slurried in 121 mL oftoluene and chilled in the freezer (−35° C.). MAO (50.5542 g of a 30% wtsolution in toluene) was added slowly in 3 parts with the silica slurryreturned to the freezer for a few minutes (approx. 2 minutes) betweenadditions. The slurry was stirred at room temperature for 2 h, filteredwith a fine glass frit filter, reslurried in 80 mL of toluene for 15 minat room temperature, and then filtered again. The solid was reslurriedin 80 mL of toluene at 80° C. for 30 min and then filtered. The solidwas reslurried in 80 mL of toluene at 80° C. for 30 min and thenfiltered a final time. The celstir and solid were washed out with 40 mLof toluene. The solid was then washed with pentane and dried undervacuum for 24 h. Collected 28.9406 g of a free flowing white powder.

Supportedrac-[(2,2′-Biphenylsilylene)bis(2-isopropyl-4-(3,5-di-t-butyl)phenylindenyl)]dimethylzirconium(Catalyst E)

In a 20 mL vial the metallocene (41.3 mg, 0.0417 mmol) was stirredalongside MAO (30% by weight in toluene, 0.4048 g of solution) alongwith another 2 mL of toluene for 1 h. In a small celstir 130° C.calcined silica pretreated with MAO (130° C. SMAO) (1.0470 g) wasslurried in 20 mL of toluene. The catalyst solution was added to theslurry and stirred for 1 h. The slurry was placed in the freezer every afew minutes. The slurry was then heated to 40° C. and stirred for 2 h.The slurry was then filtered, reslurried in 20 mL of toluene and stirredfor an additional 30 min at 60° C. The slurry was then filtered,reslurried in 20 mL of toluene and stirred for an additional 30 min at60° C. The slurry was then filtered, reslurried in 20 mL of toluene andstirred for an additional 30 min at 60° C. and then filtered for thefinal time. The celstir was washed out with 20 mL of toluene. The solidwas washed with pentane and dried under vacuum overnight. Collected0.9790 g of pink solid.

General Procedure for Small Scale Solution Polymerization

Unless stated otherwise propylene homopolymerizations andethylene-propylene copolymerizations (if any) are carried out in aparallel, pressure reactor, as generally described in U.S. Pat. No.6,306,658; U.S. Pat. No. 6,455,316; U.S. Pat. No. 6,489,168; WO00/09255; and Murphy et al., J. Am. Chem. Soc., 2003, 125, pp.4306-4317, each of which is fully incorporated herein by reference forUS purposes. Although the specific quantities, temperatures, solvents,reactants, reactant ratios, pressures, and other variables may havechanged from one polymerization run to the next, the following describesa typical polymerization performed in a parallel, pressure reactor.

Propylene Polymerization with Metallocene:

A pre-weighed glass vial insert and disposable stirring paddle werefitted to each reaction vessel of the reactor, which contains 48individual reaction vessels. The reactor was then closed and propylenewas introduced to each vessel as a condensed gas liquid (typically 1 mL)(as shown in examples 1-9 in Table 1) or gas (as shown in examples 1-29in Table 2). Then solvent (typically isohexane) was added to bring thetotal reaction volume, including the subsequent additions, to 5 mL andthe reactor vessels were heated to their set temperature (usuallybetween 50° C. and 110° C.).

The contents of the vessel were stirred at 800 rpm. An activatorsolution (typically 100-1000 molar equivalents of methyl alumoxane (MAO)in toluene) was then injected into the reaction vessel along with 500microliters of toluene, followed by a toluene solution of catalyst(typically 0.50 mM in toluene, usually 20-40 nanomols of catalyst) andanother aliquot of toluene (500 microliters). Equivalence is determinedbased on the mol equivalents relative to the moles of the transitionmetal in the catalyst complex.

The reaction was then allowed to proceed until a pre-determined amountof pressure had been taken up by the reaction. Alternatively, thereaction may be allowed to proceed for a set amount of time. At thispoint, the reaction was quenched by pressurizing the vessel withcompressed air. After the polymerization reaction, the glass vial insertcontaining the polymer product and solvent was removed from the pressurecell and the inert atmosphere glove box, and the volatile componentswere removed using a Genevac HT-12 centrifuge and Genevac VC3000D vacuumevaporator operating at elevated temperature and reduced pressure. Thevial was then weighed to determine the yield of the polymer product. Theresultant polymer was analyzed by Rapid GPC (see below) to determine themolecular weight and by DSC (see below) to determine melting point.

Ethylene Propylene Copolymerization with Supported Catalyst:

A pre-weighed glass vial insert and disposable stirring paddle is fittedto each reaction vessel of the reactor, which contains 48 individualreaction vessels. The reactor is then closed and propylene gas isintroduced to each vessel to purge the nitrogen out of the system. Ifany modules receive hydrogen, it is added during the purge process. Thesolvent (typically isohexane) is added next according to the set totalreaction volume, including the following additions, to 5 mL usually. Atthis time scavenger and/or co-catalyst and/or a chain transfer agent,such as tri-n-octylaluminum in toluene (typically 100-1000 nmol) isadded. The contents of the vessels are stirred at 800 rpm. The propyleneis now added as gas to a set pressure. Then the reactor vessels areheated to their set run temperature (usually between 50° C. and 110°C.). The ethylene is added as a comonomer and as a gas to apre-determined pressure (typically 10-100 psi) above the pressure of thepropylene while the reactor vessels were heated to a set runtemperature.

The slurry catalysts are vortexed to suspend the catalyst particles intoa solution. The buffer toluene (typically 100 microliters), the toluenesolution of catalyst (typically 3 mg/ml concentration), and anotheraliquot of toluene (500 microliters) is injected into the reactors.

The reaction is then allowed to proceed until a pre-determined amount ofpressure has been taken up by the reaction. Alternatively, the reactionmay be allowed to proceed for a set amount of time. At this point, thereaction is quenched by pressurizing the vessel with compressed air.After the polymerization reaction, the glass vial insert containing thepolymer product and solvent is removed from the pressure cell and theinert atmosphere glove box, and the volatile components are removedusing a Genevac HT-12 centrifuge and Genevac VC3000D vacuum evaporatoroperating at elevated temperature and reduced pressure. The vial is thenweighed to determine the yield of the polymer product. The resultantpolymer is analyzed by Rapid GPC (see below) to determine the molecularweight and by DSC (see below) to determine melting point.

To determine various molecular weight related values by GPC, hightemperature size exclusion chromatography was performed using anautomated “Rapid GPC” system as generally described in U.S. Pat. No.6,491,816; U.S. Pat. No. 6,491,823; U.S. Pat. No. 6,475,391; U.S. Pat.No. 6,461,515; U.S. Pat. No. 6,436,292; U.S. Pat. No. 6,406,632; U.S.Pat. No. 6,175,409; U.S. Pat. No. 6,454,947; U.S. Pat. No. 6,260,407;and U.S. Pat. No. 6,294,388; each of which is fully incorporated hereinby reference for US purposes. This apparatus has a series of three 30cm×7.5 mm linear columns, each containing PLgel 10 um, Mix B. The GPCsystem was calibrated using polystyrene standards ranging from580-3,390,000 g/mol. The system was operated at an eluent flow rate of2.0 mL/minutes and an oven temperature of 165° C. 1,2,4-trichlorobenzenewas used as the eluent. The polymer samples were dissolved in1,2,4-trichlorobenzene at a concentration of 0.1-0.9 mg/mL. 250 uL of apolymer solution was injected into the system. The concentration of thepolymer in the eluent was monitored using an evaporative lightscattering detector (for examples 1-9 in Table 1) or Polymer Char IR4detector (for examples 1-29 in Table 2 and the examples in Table 3). Themolecular weights presented are relative to linear polystyrene standardsand are uncorrected.

Differential Scanning Calorimetry (DSC)—Procedure 1 measurements wereperformed on a TA-Q200 instrument to determine the melting point of thepolymers. Samples were pre-annealed at 220° C. for 15 minutes and thenallowed to cool to room temperature overnight. The samples were thenheated to 220° C. at a rate of 100° C./minutes and then cooled at a rateof 50° C./min. Melting points were collected during the heating period.

The amount of ethylene incorporated in the polymers (weight %) wasdetermined by rapid FT-IR spectroscopy on a Bruker Vertex 70 IR inreflection mode. Samples were prepared in a thin film format byevaporative deposition techniques. Weight percent ethylene was obtainedfrom the ratio of peak heights at 729.8 and 1157.9 cm-1. This method wascalibrated using a set of ethylene/propylene copolymers with a range ofknown wt % ethylene content.

TABLE 1 Small Scale Solution Propylene Polymerization Using MTC-1,MTC-2, OR MTC-A with MAO at 70° C., using 0.025 μmol of catalyst and 500molar equivalents of MAO. Conditions: isohexane solvent, propylene (as acondensed gas liquid) added = 1 mL, total volume = 5 mL. Quench T_(m)M_(n) M_(w) Time Activity Ex. # MTC (° C.) (kg/mol) (kg/mol) Mw/Mn (sec)Yield (g) (g/mmol · hr) 1 MTC-1 159.1 219 368 1.7 181 0.1245 99,050 2MTC-1 158.7 241 383 1.6 187 0.1369 105,420 3 MTC-1 157.5 247 386 1.6 1850.1347 104,848 4 MTC-2 153.7 89 347 3.9 336 0.082 35,143 5 MTC-2 154.395 368 3.9 384 0.076 28,500 6 MTC-2 154.4 86 365 4.3 349 0.076 31,358 7MTC-A 155.5 193 309 1.6 90 0.1853 296,480 8 MTC-A 156.0 183 309 1.7 1040.2134 295,477 9 MTC-A 155.8 237 367 1.5 92 0.1627 254,661

TABLE 2 Small Scale Solution Propylene Polymerization Using 0.025 nmolof Catalysts and 500 molar equivalents of MAO. Conditions: isohexanesolvent, total volume = 5 mL. (Propylene was introduced to each vesselas gas) T_(p) Propylene T_(m) M_(w) Quench Yield Activity Ex. # Catalyst(° C.) (mmol) (° C.) (kg/mol) Mw/Mn Time (sec) (g) (g/mmol hr) 1 MTC-350 4.777 161.4 703 1.7 181 0.1222 97220 2 MTC-3 50 4.777 161.5 785 1.8169 0.1043 88871 3 MTC-3 50 9.553 159.2 501 2.6 164 0.2888 253580 4MTC-3 50 9.553 161.0 583 2.2 168 0.1849 158486 5 MTC-3 50 9.553 160.2698 2.0 180 0.1908 152640 6 MTC-3 50 19.106 158.1 514 3.1 110 0.3809498633 7 MTC-3 50 19.106 159.2 576 2.4 134 0.3762 404275 8 MTC-3 5019.106 158.5 630 3.2 169 0.3856 328559 9 MTC-3 70 4.777 157.6 303 1.8127 0.0983 111458 10 MTC-3 70 4.777 157.6 301 2.0 141 0.0958 97838 11MTC-3 70 4.777 158.1 330 1.8 150 0.0979 93984 12 MTC-3 70 9.553 158.2389 1.7 116 0.1482 183972 13 MTC-3 70 9.553 157.9 309 1.9 112 0.1860239143 14 MTC-3 70 9.553 158.0 381 1.8 117 0.1635 201231 15 MTC-3 7019.106 157.9 286 2.3 80 0.2792 502560 16 MTC-3 70 19.106 156.4 276 2.388 0.2728 446400 17 MTC-3 70 19.106 156.7 310 2.3 99 0.2475 360000 18MTC-A 50 4.777 157.2 805 1.8 111 0.129 167351 19 MTC-A 50 4.777 157.2873 1.9 158 0.121 110278 20 MTC-A 50 9.553 157.4 731 2.6 134 0.265284776 21 MTC-A 50 9.553 156.6 860 2.1 159 0.229 207396 22 MTC-A 5019.106 155.4 781 3.5 88 0.354 579273 23 MTC-A 50 19.106 155.7 1004 2.4100 0.295 424800 24 MTC-A 70 4.777 155.4 309 1.8 88 0.101 165273 25MTC-A 70 4.777 155.6 344 1.9 144 0.098 98000 26 MTC-A 70 9.553 155.6 4531.9 91 0.159 251604 27 MTC-A 70 9.553 155.7 430 1.9 99 0.166 241455 28MTC-A 70 19.106 153.6 330 2.9 80 0.316 568800 29 MTC-A 70 19.106 154.4369 2.4 102 0.281 396706 30 MTC-B 70 9.553 157.1 366 1.8 570 0.050912859

TABLE 3 Small Scale Ethylene Propylene Copolymerization Using SupportedCatalysts. Conditions: isohexane solvent, propylene (introduced to eachvessel as gas) added = 9.553 mmol, total volume = 5 mL. TNOAL C2 QuenchYield gPolymer/gcat- Mw Mw/ C2 (μmol) (μmol) Time(s) (mg) sup.hr(kg/mol) Mn wt % Catalyst D 0.4 1.426 518 133 2370 85 2.1 14.5 2.852 327136.4 3850 95 1.9 20.2 4.278 255 113.2 4098 92 2.1 23.3 5.703 192 150.67240 122 2.0 32.9 1.426 888 119.6 1243 101 1.9 13 2.852 354 134.6 351093 2.0 23.3 4.278 207 122.7 5472 99 2.3 26.9 5.703 174 153.4 8138 1201.7 36.8 Catalyst E 0.4 1.426 2701 33.6 115 391 2.0 16.3 2.852 2703 41.9143 473 2.1 21.6 4.278 2700 46.6 159 651 1.9 35.8 5.703 2702 45.2 154934 1.9 39.7 1.426 2700 25.1 86 448 1.8 16 2.852 2703 23.5 80 581 1.7 274.278 2704 26.4 90 732 1.8 32.8 5.703 2700 38.5 132 978 2.0 30.7Catalyst D 4 1.426 783 118.5 1397 70 2.5 12.1 4.278 267 139.1 4809 762.1 26.2 5.703 187 148.8 7345 87 2.6 35.0 7.842 116 223.2 17761 139 2.151.1 1.426 741 121.9 1519 81 2.4 13.1 4.278 269 139 4770 70 2.3 32.55.703 195 169.8 8038 91 2.5 34.4 7.842 134 208.8 14383 128 2.3 45.7

General Procedure for Reactor Propylene Polymerization UsingSilica-Supported Catalyst

Supported Catalyst D (ca. 0.6 g) was slurried into dry HYDROBRITE™ oilto yield a slurry that contains 5% by weight of supported catalyst. Thesupported catalyst was added to the reactor as a slurry in oil. Thecatalyst slurry containing certain amounts of catalysts (see Table 4)was injected using 250 mL propylene into a 2 L autoclave reactorcontaining propylene (1000 mL) (total propylene 1250 mL), H₂ (providedfrom a 183 mL container under the pressure indicated in the table) andtri-n-octylaluminum, 1.0 mL of a 4.76 vol % hexane solution, at ambienttemperature for 5 minutes. Subsequently, the reactor temperature wasraised to 70° C. and the polymerization was run for an allotted periodof time typically 40 or 50 minutes. After the allotted time the reactorwas cooled to room temperature and vented.

Gel Permeation Chromatography-DRI (GPC-DRI)

Mw, Mn and Mw/Mn are determined by using a High Temperature GelPermeation Chromatography (Polymer Laboratories), equipped with adifferential refractive index detector (DRI). Three Polymer LaboratoriesPLgel 10 μm Mixed-B columns are used. The nominal flow rate is 1.0mL/min, and the nominal injection volume is 300 μL. The various transferlines, columns, and differential refractometer (the DRI detector) arecontained in an oven maintained at 160° C. Solvent for the experiment isprepared by dissolving 6 grams of butylated hydroxytoluene as anantioxidant in 4 liters of Aldrich reagent grade 1, 2, 4trichlorobenzene (TCB). The TCB mixture is then filtered through a 0.1μm Teflon filter. The TCB is then degassed with an online degasserbefore entering the GPC instrument. Polymer solutions are prepared byplacing dry polymer in glass vials, adding the desired amount of TCB,then heating the mixture at 160° C. with continuous shaking for about 2hours. All quantities are measured gravimetrically. The injectionconcentration is from 0.5 to 2.0 mg/ml, with lower concentrations beingused for higher molecular weight samples. Prior to running each samplethe DRI detector is purged. Flow rate in the apparatus is then increasedto 1.0 ml/minute, and the DRI is allowed to stabilize for 8 hours beforeinjecting the first sample. The molecular weight is determined bycombining universal calibration relationship with the column calibrationwhich is performed with a series of monodispersed polystyrene (PS)standards. The MW is calculated at each elution volume with followingequation.

${\log \; M_{X}} = {\frac{\log \left( {K_{X}/K_{PS}} \right)}{a_{X} + 1} + {\frac{a_{PS} + 1}{a_{X} + 1}\log \; M_{PS}}}$

where the variables with subscript “X” stand for the test sample whilethose with subscript “PS” stand for PS. In this method, a_(PS)=0.67 andK_(PS)=0.000175 while a_(X) and K_(X) are obtained from publishedliterature. Specifically, a/K=0.695/0.000579 for PE and 0.705/0.0002288for PP.

The concentration, c, at each point in the chromatogram is calculatedfrom the baseline-subtracted DRI signal, I_(DRI), using the followingequation:

c=K _(DRI) I _(DRI)/(dn/dc)

where K_(DRI) is a constant determined by calibrating the DRI, and(dn/dc) is the refractive index increment for the system. Specifically,dn/dc=0.109 for both PE and PP.

The mass recovery is calculated from the ratio of the integrated area ofthe concentration chromatography over elution volume and the injectionmass which is equal to the pre-determined concentration multiplied byinjection loop volume.

All molecular weights are reported in g/mol unless otherwise noted. Inevent of conflict between the GPC-DRI procedure and the “Rapid GPC,” theGPC-DRI procedure immediately above shall be used.

Differential Scanning Calorimetry (DSC)—Procedure-2

Peak crystallization temperature (T_(c)) and peak melting temperature(T_(m)) were measured via Differential Scanning Calorimetry using aDSCQ200 unit. The sample was first equilibrated at 25° C. andsubsequently heated to 220° C. using a heating rate of 10° C./min (firstheat). The sample was held at 220° C. for 3 min. The sample wassubsequently cooled down to −100° C. with a constant cooling rate of 10°C./min (first cool). The sample was equilibrated at −100° C. beforebeing heated to 220° C. at a constant heating rate of 10° C./min (secondheat). The exothermic peak of crystallization (first cool) was analyzedusing the TA Universal Analysis software and the corresponding to 10°C./min cooling rate was determined. The endothermic peak of melting(second heat) was also analyzed using the TA Universal Analysis softwareand the peak melting temperature (T_(m)) corresponding to 10° C./minheating rate was determined. In event of conflict between the DSCProcedure-1 and DSC procedure-2, DSC procedure-2 shall be used.

Melt Flow Rate (MFR)

MFR was measured as per ASTM D1238, condition L, at 230° C. and 2.16 kgload using a melt indexer.

1% Secant Flexural Modulus

The 1% Secant flexural modulus is measured using an ISO 37-Type 3 bar,with a crosshead speed of 1.0 mm/min and a support span of 30.0 mm usingan Instron machine according to ASTM D 790 (A, 1.0 mm/min).

TABLE 4 Propylene Polymerization Using Silica-SupportedRac-Dimethylsilyl Bis(2-cyclopropyl-4-(3,5-di-tert-butylphenyl)-indenyl) Zirconium Dichloride(70° C.) Catalyst H₂ Activity (g 1% Sec Amount Run time (at Pressurepolymer/g MFR Modulus M_(w) (mg) 70° C.) (min) (psi) Yield (g) cat)T_(m) (° C.) (dg/min) (MPa) (kg/mol) Mw/Mn 61 40 0 46.29 759 154.4 2.51576 351 3.4 60 50 14 205.7 3428 154.1 181 1202 116 3.7 60 50 7 169.42823 153.8 42 1255 167 3.6 61 50 9 180.5 2959 153.8 63 1327 149 3.2

Solution phase polymerization (Table 1 and 2) provided a narrower Mw/Mnwhereas supported polymerization (Table 3) provided a broader Mw/Mn.

Preferred catalyst compounds were treated to isolate higher purity racforms of catalyst via crystallization and to remove the meso form.

All documents described herein are incorporated by reference herein,including any priority documents and/or testing procedures to the extentthey are not inconsistent with this text, provided however that anypriority document not named in the initially filed application or filingdocuments is not incorporated by reference herein. As is apparent fromthe foregoing general description and the specific embodiments, whileforms of the invention have been illustrated and described, variousmodifications can be made without departing from the spirit and scope ofthe invention. Accordingly, it is not intended that the invention belimited thereby. Likewise, the term “comprising” is consideredsynonymous with the term “including” for purposes of Australian law.Likewise whenever a composition, an element or a group of elements ispreceded with the transitional phrase “comprising”, it is understoodthat we also contemplate the same composition or group of elements withtransitional phrases “consisting essentially of,” “consisting of”,“selected from the group of consisting of,” or “is” preceding therecitation of the composition, element, or elements and vice versa.

1. A metallocene catalyst compound represented by the formula:

wherein, each of the indenyl rings are substituted with identicalsubstituents at identical positions; R⁴ and R¹⁰ are phenyl groupssubstituted at the 3′ and 5′ positions; R² and R⁸ are cyclic groups; Mis a group transition 2, 3 or 4 metal; T is a bridging group; each X isan anionic leaving group; and each R¹, R³, R⁵, R⁶, R⁷, R⁹, R¹¹, R¹²,R¹³, and R¹⁴ is, independently, hydrogen, or a hydrocarbyl, substitutedhydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl,substituted silylcarbyl, germylcarbyl, or substituted germylcarbylsubstituents.
 2. The metallocene catalyst of claim 1, wherein R² and R⁸are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, orcyclooctyl groups.
 3. The metallocene catalyst of claim 1, wherein R⁴and R¹⁰ are substituted at 3′ and 5′ positions of the phenyl rings witha C₁ to a C₁₀ alkyl group.
 4. The metallocene catalyst of claim 3,wherein the C₁ to C₁₀ alkyl group is t-butyl, sec-butyl, n-butyl,i-propyl, n-propyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl,cycloheptyl, cyclooctyl, phenyl, mesityl, or adamantyl.
 5. Themetallocene catalyst of claim 1, wherein M is Hf and/or Zr.
 6. Themetallocene catalyst of claim 1, wherein each X is, independently,selected from the group consisting of hydrocarbyl radicals having from 1to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides,halides, dienes, amines, phosphines, ethers, and a combination thereof,(two X's may form a part of a fused ring or a ring system).
 7. Themetallocene catalyst claim 1, wherein T is represented by the formula R₂^(a)J, where J is C, Si, or Ge, and each R^(a) is, independently,hydrogen, halogen, C₁ to C₂₀ hydrocarbyl or a C₁ to C₂₀ substitutedhydrocarbyl, and two R^(a) can form a cyclic structure includingaromatic, partially saturated, or saturated cyclic or fused ring system.8. The metallocene catalyst of claim 1, wherein T is CH₂, CH₂CH₂,C(CH₃)₂, SiMe₂, SiPh₂, SiMePh, Si(CH₂)₃, Si(CH₂)₄, Si(Me₃SiPh)₂, orSi(CH₂)₅.
 9. The metallocene catalyst of claim 1, wherein the catalystis one or more of:dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-butylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-butylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-phenylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-phenylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-isopropylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-isopropylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-methylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-methylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-hexylphenyl)indenyl)HfCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-t-hexylphenyl)indenyl)ZrCl₂,dimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-n-butylphenyl)indenyl)HfCl₂,and/ordimethylsilylbis(2-cyclopropyl,4-(3′,5′-di-nt-butylphenyl)indenyl)ZrCl₂.10. The metallocene catalyst of claim 1, wherein the rac/meso ratio is5:1 or greater.
 11. The metallocene catalyst of claim 1, wherein therac/meso ratio is 7:1 or greater.
 12. The metallocene catalyst of claim1, wherein the rac/meso ratio is 20:1 or greater.
 13. A catalyst systemcomprising activator and the metallocene compound claim
 1. 14. Thecatalyst system of claim 13, wherein the activator comprises alumoxane.15. The catalyst system of claim 13, wherein alumoxane is present at amolar ratio of aluminum to catalyst compound transition metal of 100:1or more.
 16. The catalyst system of claim 13, wherein the activatorcomprises a non-coordinating anion activator.
 17. The catalyst system ofclaim 13, wherein activator is represented by the formula:(Z)_(d) ⁺(A^(d−)) wherein Z is (L-H) or a reducible Lewis Acid, L is anneutral Lewis base; H is hydrogen; (L-H)⁺ is a Bronsted acid; A^(d−) isa non-coordinating anion having the charge d−; and d is an integer from1 to
 3. 18. The catalyst system of claim 13, wherein activator isrepresented by the formula:(Z)_(d) ⁺(A^(d−)) wherein A^(d−) is a non-coordinating anion having thecharge d−; d is an integer from 1 to 3, and Z is a reducible Lewis acidrepresented by the formula: (Ar₃C⁺), where Ar is aryl or arylsubstituted with a heteroatom, a C₁ to C₄₀ hydrocarbyl, or a substitutedC₁ to C₄₀ hydrocarbyl.
 19. The catalyst system of claim 13, wherein theactivator is one or more of: N,N-dimethylaniliniumtetrakis(pentafluorophenyl)borate, triphenylcarbeniumtetrakis(pentafluorophenyl)borate, trimethylammoniumtetrakis(perfluoronaphthyl)borate, triethylammoniumtetrakis(perfluoronaphthyl)borate, tripropylammoniumtetrakis(perfluoronaphthyl)borate, tri(n-butyl)ammoniumtetrakis(perfluoronaphthyl)borate, tri(t-butyl)ammoniumtetrakis(perfluoronaphthyl)borate, N,N-dimethylaniliniumtetrakis(perfluoronaphthyl)borate, N,N-diethylaniliniumtetrakis(perfluoronaphthyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluoronaphthyl)borate,tropillium tetrakis(perfluoronaphthyl)borate, triphenylcarbeniumtetrakis(perfluoronaphthyl)borate, triphenylphosphoniumtetrakis(perfluoronaphthyl)borate, triethylsilyliumtetrakis(perfluoronaphthyl)borate,benzene(diazonium)tetrakis(perfluoronaphthyl)borate, trimethylammoniumtetrakis(perfluorobiphenyl)borate, triethylammoniumtetrakis(perfluorobiphenyl)borate, tripropylammoniumtetrakis(perfluorobiphenyl)borate, tri(n-butyl)ammoniumtetrakis(perfluorobiphenyl)borate, tri(t-butyl)ammoniumtetrakis(perfluorobiphenyl)borate, N,N-dimethylaniliniumtetrakis(perfluorobiphenyl)borate, N,N-diethylaniliniumtetrakis(perfluorobiphenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluorobiphenyl)borate,tropillium tetrakis(perfluorobiphenyl)borate, triphenylcarbeniumtetrakis(perfluorobiphenyl)borate, triphenylphosphoniumtetrakis(perfluorobiphenyl)borate, triethylsilyliumtetrakis(perfluorobiphenyl)borate,benzene(diazonium)tetrakis(perfluorobiphenyl)borate,[4-t-butyl-PhNMe₂H][(C₆F₃ (C₆F₅)₂)₄B], trimethylammoniumtetraphenylborate, triethylammonium tetraphenylborate, tripropylammoniumtetraphenylborate, tri(n-butyl)ammonium tetraphenylborate,tri(t-butyl)ammonium tetraphenylborate, N,N-dimethylaniliniumtetraphenylborate, N,N-diethylanilinium tetraphenylborate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetraphenylborate, tropilliumtetraphenylborate, triphenylcarbenium tetraphenylborate,triphenylphosphonium tetraphenylborate, triethylsilyliumtetraphenylborate, benzene(diazonium)tetraphenylborate,trimethylammonium tetrakis(pentafluorophenyl)borate, triethylammoniumtetrakis(pentafluorophenyl)borate, tripropylammoniumtetrakis(pentafluorophenyl)borate, tri(n-butyl)ammoniumtetrakis(pentafluorophenyl)borate, tri(sec-butyl)ammoniumtetrakis(pentafluorophenyl)borate, N,N-dimethylaniliniumtetrakis(pentafluorophenyl)borate, N,N-diethylaniliniumtetrakis(pentafluorophenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(pentafluorophenyl)borate,tropillium tetrakis(pentafluorophenyl)borate, triphenylcarbeniumtetrakis(pentafluorophenyl)borate, triphenylphosphoniumtetrakis(pentafluorophenyl)borate, triethylsilyliumtetrakis(pentafluorophenyl)borate,benzene(diazonium)tetrakis(pentafluorophenyl)borate, trimethylammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, triethylammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, tripropylammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, tri(n-butyl)ammoniumtetrakis-(2,3,4,6-tetrafluoro-phenyl)borate, dimethyl(t-butyl)ammoniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-dimethylaniliniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-diethylaniliniumtetrakis-(2,3,4,6-tetrafluorophenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate,tropillium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,triphenylcarbenium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,triphenylphosphonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,triethylsilylium tetrakis-(2,3,4,6-tetrafluorophenyl)borate,benzene(diazonium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate,trimethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,tripropylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,tri(n-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,tri(t-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,N,N-dimethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,N,N-diethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,tropillium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triphenylphosphonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,triethylsilylium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,benzene(diazonium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate,di-(i-propyl)ammonium tetrakis(pentafluorophenyl)borate,dicyclohexylammonium tetrakis(pentafluorophenyl)borate,tri(o-tolyl)phosphonium tetrakis(pentafluorophenyl)borate,tri(2,6-dimethylphenyl)phosphonium tetrakis(pentafluorophenyl)borate,triphenylcarbenium tetrakis(perfluorophenyl)borate,1-(4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluorophenyl)pyrrolidinium,tetrakis(pentafluorophenyl)borate,4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluoropyridine, andtriphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate). 20.The catalyst system of claim 13, wherein the catalyst system issupported.
 21. The catalyst system of claim 13, wherein the catalystsystem is supported on silica.
 22. A process to polymerize olefinscomprising contacting one or more olefins with the catalyst system ofclaim
 13. 23. The process of claim 22, wherein the polymerization occursin solution phase and the process produces a polymer having an Mw/Mn offrom about 1.7 to about 2.5.
 24. The process of claim 22, wherein themetallocene catalyst or catalyst system is on a support and the processproduces a polymer having an Mw/Mn of from about 2.5 to about
 15. 25.The process of claim 22, wherein the process occurs at a temperature offrom about 0° C. to about 300° C., at a pressure in the range of fromabout 0.35 MPa to about 10 MPa, and at a time up to 300 minutes.
 26. Theprocess of claim 25 further comprising obtaining polymer.
 27. Theprocess of claim 26, wherein the polymer obtained has an MFR of 10dg/min or more and a 1% Secant flexural modulus of than 1500 MPa ormore.
 28. The process of claim 22 wherein no hydrogen is added to thepolymerization.
 29. The process of claim 22, wherein the polymerobtained has a melting point of 152° C. or more.
 30. The process ofclaim 22, wherein the polymer obtained has an MFR of 10 dg/min or moreand a 1% Secant flexural modulus of than 1500 MPa or more.
 31. Theprocess of claim 22, wherein the polymer obtained has Tm of 155° C. ormore and an Mw of 330,000 g/mol or more.
 32. The catalyst system ofclaim 13 wherein R² and R⁸ are cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, cycloheptyl, or cyclooctyl groups; R⁴ and R¹⁰ aresubstituted at 3′ and 5′ positions of the phenyl rings with a C₁ to aC₁₀ alkyl group; M is Hf, Ti and/or Zr; each X is, independently,selected from the group consisting of hydrocarbyl radicals having from 1to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides,halides, dienes, amines, phosphines, ethers, and a combination thereof,(two X's may form a part of a fused ring or a ring system); T isrepresented by formula R₂ ^(a)J, where J is C, Si, or Ge, and each R^(a)is, independently, hydrogen, halogen, C₁ to C₂₀ hydrocarbyl or a C₁ toC₂₀ substituted hydrocarbyl, and two R^(a) can form a cyclic structureincluding aromatic, partially saturated, or saturated cyclic or fusedring system.
 33. The catalyst system of claim 32 wherein T is CH₂,CH₂CH₂, C(CH₃)₂, SiMe₂, SiPh₂, SiMePh, Si(CH₂)₃, Si(CH₂)₄, Si(Me₃SiPh)₂,or Si(CH₂)₅.
 34. The process of claim 22 wherein R² and R⁸ arecyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, orcyclooctyl groups; R⁴ and R¹⁰ are substituted at 3′ and 5′ positions ofthe phenyl rings with a C₁ to a C₁₀ alkyl group; M is Hf and/or Zr; eachX is, independently, selected from the group consisting of hydrocarbylradicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides,sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and acombination thereof, (two X's may form a part of a fused ring or a ringsystem); T is represented by formula R₂ ^(a)J, where J is C, Si, or Ge,and each R^(a) is, independently, hydrogen, halogen, C₁ to C₂₀hydrocarbyl or a C₁ to C₂₀ substituted hydrocarbyl, and two R^(a) canform a cyclic structure including aromatic, partially saturated, orsaturated cyclic or fused ring system.
 35. The catalyst system of claim19 wherein R² and R⁸ are cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, cycloheptyl, or cyclooctyl groups; R⁴ and R¹⁰ aresubstituted at 3′ and 5′ positions of the phenyl rings with a C₁ to aC₁₀ alkyl group; M is Hf and/or Zr; each X is, independently, selectedfrom the group consisting of hydrocarbyl radicals having from 1 to 20carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides,halides, dienes, amines, phosphines, ethers, and a combination thereof,(two X's may form a part of a fused ring or a ring system); T isrepresented by formula R₂ ^(a)J, where J is C, Si, or Ge, and each R^(a)is, independently, hydrogen, halogen, C₁ to C₂₀ hydrocarbyl or a C₁ toC₂₀ substituted hydrocarbyl, and two R^(a) can form a cyclic structureincluding aromatic, partially saturated, or saturated cyclic or fusedring system.
 36. The catalyst system of claim 14 wherein R² and R⁸ arecyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, orcyclooctyl groups; R⁴ and R¹⁰ are substituted at 3′ and 5′ positions ofthe phenyl rings with a C₁ to a C₁₀ alkyl group; M is Hf and/or Zr; eachX is, independently, selected from the group consisting of hydrocarbylradicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides,sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and acombination thereof, (two X's may form a part of a fused ring or a ringsystem); T is represented by formula R₂ ^(a)J, where J is C, Si, or Ge,and each R^(a) is, independently, hydrogen, halogen, C₁ to C₂₀hydrocarbyl or a C₁ to C₂₀ substituted hydrocarbyl, and two R^(a) canform a cyclic structure including aromatic, partially saturated, orsaturated cyclic or fused ring system.
 37. A process to polymerizeolefins comprising contacting one or more olefins with the catalystsystem of claim
 36. 38. A process to polymerize olefins comprisingcontacting one or more olefins with the catalyst system of claim
 35. 39.The compound of claim 1 wherein the rac/meso ratio is 90:1 or more.